title stringlengths 10 172 | question_id int64 469 40.1M | question_body stringlengths 22 48.2k | question_score int64 -44 5.52k | question_date stringlengths 20 20 | answer_id int64 497 40.1M | answer_body stringlengths 18 33.9k | answer_score int64 -38 8.38k | answer_date stringlengths 20 20 | tags list |
|---|---|---|---|---|---|---|---|---|---|
How do I create a "dummy" module object? | 38,687,075 | <p>Suppose I have a function that takes a module object as an argument and does something to it -- maybe monkeypatches it. For testing purposes, how do I create a dummy module object to pass to it?</p>
| 2 | 2016-07-31T18:20:47Z | 38,687,085 | <p>Like this (<a href="https://docs.python.org/3/library/types.html#types.ModuleType" rel="nofollow">docs</a>)</p>
<pre><code>>>> import types
>>> types.ModuleType('my_module')
<module 'my_module'>
</code></pre>
| 1 | 2016-07-31T18:21:59Z | [
"python",
"python-3.x"
] |
Program to read multiple URLs and generate a word (Should only contains alphanumeric) frequency table | 38,687,095 | <p>I am writing a Python program to read multiple URLs and generate a word (a word only contains letters A-Za-z0-9) frequency table. Output can be stored in files with names url1.txt, url2.txt</p>
<p>This is what i have so far:</p>
<pre><code>import urllib2
import obo
url = 'sample url'
response = urllib2.urlopen(u... | -1 | 2016-07-31T18:22:37Z | 38,687,169 | <p>You can use boilerpipe to easily extract the text: <a href="https://github.com/misja/python-boilerpipe" rel="nofollow">https://github.com/misja/python-boilerpipe</a>.</p>
<p>The code might look like this: </p>
<pre><code>from boilerpipe.extract import Extractor
from collections import Counter
urls = ['url1', 'url... | 0 | 2016-07-31T18:31:54Z | [
"python"
] |
how does Python handle "from __future__ import division"? | 38,687,131 | <p>I've looked at the <a href="https://hg.python.org/cpython/file/2.7/Lib/__future__.py" rel="nofollow">source code for __future__.py</a> and it makes no sense to me -- how does this actually work, to change the behavior of division?</p>
| 1 | 2016-07-31T18:26:13Z | 38,687,330 | <p>That module only serves a documentary / introspection purpose; none of the code in it actually <em>does</em> anything.</p>
<p>Rather, when Python is compiling a module, it calls <a href="https://hg.python.org/cpython/file/2.7/Python/compile.c#l272" rel="nofollow">PyFuture_FromAST</a> on the module, which checks for... | 3 | 2016-07-31T18:48:12Z | [
"python"
] |
Why python is "shy" to use memory in docker? | 38,687,134 | <p>I'm running a memory intensive python script (pandas, numpy, machine learning) in docker and performance is terrible.</p>
<p>In my host machine the script uses more than 10GB of RAM. The dockerized python script uses only 3Gb (com.docker.hyperkit process). I have already changer my docker memory preferences to 10gb... | -1 | 2016-07-31T18:26:59Z | 38,687,403 | <p>Computer programs use other resources besides memmory. There's CPU, I/O devices and information.
I would guess that this behavior you're seeing is the result of other resource been exausted. For instance, your I/O device could be causing a bottleneck before memmory is filled up. This is just a guess, because I have ... | 1 | 2016-07-31T18:57:50Z | [
"python",
"docker"
] |
How to process python dictionary items in the order of value item? | 38,687,261 | <p>I get the following JSON from a web service. How to get an ordered collection from the following JSON in Python. I want to process key value pairs in the ascending order of "order" number.</p>
<pre><code>{
"key1": {
"order": 10,
"name": "somenameZ"
},
"key2": {
"order": 3,
"name": "somenameY"
... | 0 | 2016-07-31T18:39:27Z | 38,687,286 | <p>Sort the <code>dict.items()</code> result with a custom key:</p>
<pre><code>ordered = sorted(outerdict.items(), key=lambda kv: kv[1]['order'])
for key, item in ordered:
# ...
</code></pre>
<p>If you only need the nested dictionaries, and not the outer keys, you could do the same for <code>dict.values()</code>:... | 3 | 2016-07-31T18:42:06Z | [
"python",
"json",
"sorting",
"dictionary"
] |
Counting how many times a row occurs in a matrix (numpy) | 38,687,292 | <p>Is there a better way to count how many times a given row appears in a numpy 2D array than</p>
<pre><code>def get_count(array_2d, row):
count = 0
# iterate over rows, compare
for r in array_2d[:,]:
if np.equal(r, row).all():
count += 1
return count
# let's make sure it works... | 4 | 2016-07-31T18:42:54Z | 38,687,313 | <p>One simple way would be with <a href="http://docs.scipy.org/doc/numpy/user/basics.broadcasting.html" rel="nofollow"><code>broadcasting</code></a> -</p>
<pre><code>(array_2d == row).all(-1).sum()
</code></pre>
<hr>
<p>Considering memory efficiency, here's one approach considering each row from <code>array_2d</code... | 3 | 2016-07-31T18:46:07Z | [
"python",
"numpy"
] |
Text file does not get opened in output window.Python (Pycharm IDE) | 38,687,319 | <p>So I just began learning Python and after making a file named myfile.txt I tried running this bit of code</p>
<pre><code>def Main():
f=open("myfile.txt","r")
for line in f:
print(line)
f.close()
if __name__ =="__main__":
Main()
</code></pre>
<p>The file doesn't open , I'm just ... | 1 | 2016-07-31T18:47:05Z | 38,687,337 | <p>deindent the <code>if</code></p>
<pre><code>def Main():
f=open("myfile.txt","r")
for line in f:
print(line)
f.close()
if __name__ =="__main__":
Main()
</code></pre>
<p>The <code>if</code> was part of your <code>Main</code> function, so you had a recursive function when the the conditio... | 1 | 2016-07-31T18:49:18Z | [
"python",
"file-io",
"pycharm"
] |
Text file does not get opened in output window.Python (Pycharm IDE) | 38,687,319 | <p>So I just began learning Python and after making a file named myfile.txt I tried running this bit of code</p>
<pre><code>def Main():
f=open("myfile.txt","r")
for line in f:
print(line)
f.close()
if __name__ =="__main__":
Main()
</code></pre>
<p>The file doesn't open , I'm just ... | 1 | 2016-07-31T18:47:05Z | 38,687,385 | <p>First you need to make sure you indentions are correct. You should not close the file when inside the loop, so it's to much indented. And to run the program your <code>if __name__ =="__main__":</code> must be defined outside the function. Try this: </p>
<pre><code>def main():
f = open("myfile.txt","r")
for... | 3 | 2016-07-31T18:55:49Z | [
"python",
"file-io",
"pycharm"
] |
How to run custom seq2seq learning (using pre-calculated word embeddings) encoder-decoder in Tensorflow? | 38,687,369 | <p>I need to run a encoder-decoder model in Tensorflow. I see that using the available APIs <code>basic_rnn_seq2seq(encoder_input_data, decoder_input_data, lstm_cell)</code> etc, a encoder-decoder system can be created.</p>
<ol>
<li>How can we enter the embeddings such as word2vec in such model? I am
aware that we can... | 0 | 2016-07-31T18:53:56Z | 38,700,227 | <p>First question:
Probably not the best way, but what I did was, after building the model, before training starts:</p>
<pre><code>for v in tf.trainable_variables():
if v.name == 'embedding_rnn_seq2seq/RNN/EmbeddingWrapper/embedding:0':
assign_op = v.assign(my_word2vec_matrix)
session.run(assign_op) # or `a... | 2 | 2016-08-01T13:31:13Z | [
"python",
"tensorflow",
"deep-learning",
"lstm",
"language-model"
] |
Tkinter Loop Never Exits Cleanly | 38,687,396 | <p>Python 2.7</p>
<p>I have written a <code>run</code> method for my Tkinter GUI rather than using the standard <code>mainloop</code>, and it always exits on an error when I close the window, even after implementing a <code>WM_DELETE_WINDOW</code> protocol as advised elsewhere on SO. I tried invoking <code>exit</code... | 0 | 2016-07-31T18:56:52Z | 38,729,490 | <p>Without the mainloop, tkinter cannot get the <code>WM_DELETE_WINDOW</code> message to call your exit function. (Or rather, it can only catch anything during the ~millisecond of the <code>update_idletasks</code> call, as it won't queue since tkinter doesn't have an event loop (and thus queue) going since you never st... | 1 | 2016-08-02T20:03:29Z | [
"python",
"python-2.7",
"tkinter",
"tkinter-canvas",
"event-loop"
] |
I try to create and SQL table that contains 10000 rows from random elements. It gives me an error | 38,687,476 | <p>I'm trying to create an SQL table, it runs by this (this is in and SQL file, what I call in the end of my code '1-fake-mentor-candidates.sql')</p>
<pre><code>CREATE TABLE "mentor_candidates" (
first_name varchar(255) NOT NULL,
last_name varchar(255) NOT NULL,
phone_number varchar(100) NOT NULL,
emai... | 0 | 2016-07-31T19:05:50Z | 38,687,590 | <p>You tried to access instance attributes in a classmethod. You need to create instances:</p>
<pre><code>class FakeMentors:
first_name_to_pick = ['Attila', 'Prezmek', 'John', 'Tim', 'Matthew', 'Andy', 'Giancarlo']
last_name_to_pick = ['Monoczki', 'Szodoray', 'Ciacka', 'Carrey', 'Obama', 'Lebron', 'Hamilton', ... | 1 | 2016-07-31T19:18:59Z | [
"python",
"postgresql"
] |
Add current element in array + next element in array while iterating through array in Python | 38,687,480 | <p>What's the best way to add the first element in an array to the next element in the same array, then add the result to the next element of the array, and so on? For example, I have an array:</p>
<pre><code>s=[50, 1.2658, 1.2345, 1.2405, 1.2282, 1.2158, 100]
</code></pre>
<p>I would like the end array to look like ... | 1 | 2016-07-31T19:06:09Z | 38,687,502 | <p>The beset way is using <code>numpy.cumsum()</code> for all of your items except the last one then append the last one to the result of <code>cumsum()</code>:</p>
<pre><code>>>> import numpy as np
>>> s=[50, 1.2658, 1.2345, 1.2405, 1.2282, 1.2158, 100]
>>>
>>> np.append(np.cumsum... | 1 | 2016-07-31T19:08:54Z | [
"python",
"arrays"
] |
Add current element in array + next element in array while iterating through array in Python | 38,687,480 | <p>What's the best way to add the first element in an array to the next element in the same array, then add the result to the next element of the array, and so on? For example, I have an array:</p>
<pre><code>s=[50, 1.2658, 1.2345, 1.2405, 1.2282, 1.2158, 100]
</code></pre>
<p>I would like the end array to look like ... | 1 | 2016-07-31T19:06:09Z | 38,687,539 | <p>You can use <code>numpy.cumsum()</code>:</p>
<pre><code>import numpy as np
np.append(np.cumsum(s[:-1]), s[-1])
# array([50., 51.2658, 52.5003, 53.7408, 54.969 , 56.1848, 100.])
</code></pre>
| 1 | 2016-07-31T19:12:14Z | [
"python",
"arrays"
] |
How to use Faker from Factory_boy | 38,687,492 | <p><code>Factory_boy</code> uses <code>fake-factory (Faker)</code> to generate random values, I would like to generate some random values in my Django tests using Faker directly.</p>
<p>Factory_boy docs suggests using <code>factory.Faker</code> and its provider as :</p>
<pre><code>class RandomUserFactory(factory.Fact... | 0 | 2016-07-31T19:07:09Z | 38,720,172 | <p>You can use faker with factory_boy like this:</p>
<pre><code>class RandomUserFactory(factory.Factory):
class Meta:
model = models.User
first_name = factory.Faker('first_name')
user = RandomUserFactory()
print user.first_name
# 'Emily
</code></pre>
<p>So you need to instantiate a user with factor... | 0 | 2016-08-02T12:15:47Z | [
"python",
"factory",
"django-testing",
"faker",
"factory-boy"
] |
ImportError: No module named rl.algorithms.deepq | 38,687,495 | <p>I cloned the repo from here: <a href="https://github.com/wingedsheep/rl" rel="nofollow">https://github.com/wingedsheep/rl</a></p>
<p>I now tried to run the code, </p>
<pre><code>cd rl
python examples/runner_lunarlander.py
</code></pre>
<p>I get the error:</p>
<pre><code>Traceback (most recent call last):
File ... | 0 | 2016-07-31T19:07:37Z | 38,687,832 | <p>Your are getting this error because the module (code) you're trying to run is not on your python's PYTHONPATH. PYTHONPATH environment variable is responsible to update and inform python where to look for imports. There are lot of ways for setting it. </p>
<p>You could add this in your ~/.bashrc file for more perman... | 0 | 2016-07-31T19:49:27Z | [
"python",
"python-2.7",
"import",
"anaconda"
] |
Django1.9: No model matches the given query | 38,687,572 | <p>I am following a tutorial to create a blog.
The code is correct according to the tutorial.
The only difference is that I use Django 1.9 instead of 1.8</p>
<p>Calling the <code>Post</code> model in the view without </p>
<pre><code>publish__year=year,
publish__month=month,
publish__day=day)
</code></pre>
<p>doesn't... | 0 | 2016-07-31T19:17:35Z | 38,688,330 | <p>As I got it, you can either change <code>self.publish.strftime('%m')</code> and <code>self.publish.strftime('%d')</code> to <code>self.publish.month</code> and <code>self.publish.day</code>,
either you can convert passed data into int <code>publish__year=int(year), pub... | 0 | 2016-07-31T20:54:32Z | [
"python",
"django",
"view",
"model"
] |
UnicodeDecodeError for Reading files in Python | 38,687,591 | <pre><code>pythonNotes = open('E:\\Python Notes.docx','r')
read_it_now = pythonNotes.read()
print(read_it_now.encode('utf-16'))
</code></pre>
<p>When I try this code, I get:</p>
<p><code>UnicodeDecodeError: 'charmap' can't decode byte 0x8f in position 591 character maps to <undefined></code></p>
<p>I am runnin... | -1 | 2016-07-31T19:19:00Z | 38,687,769 | <p>This error <a href="http://www.i18nqa.com/debug/bug-double-conversion.html" rel="nofollow">can occur</a> when text that is already in utf-8 format is read in as an 8-bit encoding, and python tries to "decode" it to Unicode: Bytes that have no meaning in the supposed encoding throw a <code>UnicodeDecodeError</code>. ... | 0 | 2016-07-31T19:42:06Z | [
"python"
] |
Download entire directory via FTP using Python | 38,687,599 | <p>Trying to put together my first useful Python program, with the aim of automating my website backups. I watched a tutorial on how to download a single file, but when it comes to a folder I'm less clear. I'd like to create a local backup of an entire folder from my website via FTP.</p>
<p>So far I have come up with ... | 0 | 2016-07-31T19:19:57Z | 38,687,671 | <p>You don't need to change your working directory just save your files in your intended path.</p>
<p>And for downloading the files you first need to get the list of file names:</p>
<pre><code>file_list = []
ftp.retrlines('LIST', lambda x: file_list.append(x.split()))
</code></pre>
<p>Then separate the files, from d... | 1 | 2016-07-31T19:30:05Z | [
"python",
"ftp"
] |
Trying to position plots next to each other | 38,687,737 | <p>I am trying to position two plots next to each other, but dont know how do it right. Could someone pls help me. </p>
<p>This is the first plot</p>
<pre><code>x_new = np.linspace(dsa[0], dsa[-1], num=len(dsa)*10)
coefs = poly.polyfit(dsa, Wechsel, 1)
ffit = poly.polyval(x_new, coefs)
plt.grid(True)
plt.xlabel("... | 0 | 2016-07-31T19:37:13Z | 38,687,790 | <p>You can use <code>plt.subplots</code>:</p>
<pre><code>f, (ax1, ax2) = plt.subplots(1, 2)
x_new = np.linspace(dsa[0], dsa[-1], num=len(dsa)*10)
coefs = poly.polyfit(dsa, Wechsel, 1)
ffit = poly.polyval(x_new, coefs)
ax1.grid(True)
ax1.set_xlabel("Druck p in mbar")
ax1.set_ylabel("Minimawechse... | 0 | 2016-07-31T19:44:01Z | [
"python",
"matplotlib"
] |
Issue sending mail with smtp python | 38,687,747 | <p>I'm working in an app that sends an icalendar file to a mail and I've an issue with it. The main fact is that the app works in a properly way in all the cases except one. I've been testing the app with the wifi of my university (only students have acces to this wifi) and It couldn't be sent (the app enter in a loop ... | 0 | 2016-07-31T19:38:36Z | 38,688,154 | <p>Turn on SMTP session debugging. It should provide some clues.</p>
<p><a href="https://docs.python.org/3/library/smtplib.html#smtplib.SMTP.set_debuglevel" rel="nofollow">https://docs.python.org/3/library/smtplib.html#smtplib.SMTP.set_debuglevel</a></p>
| 0 | 2016-07-31T20:31:18Z | [
"python",
"email",
"smtp",
"port",
"icalendar"
] |
Time difference in python not working for some dates | 38,687,780 | <p>I have this function to count difference between two timestamps in seconds.</p>
<pre><code>def diffdates(d1, d2):
diff = (time.mktime(time.strptime(d2,"%Y-%m-%dT%H:%M:%S")) -
time.mktime(time.strptime(d1, "%Y-%m-%dT%H:%M:%S")))
pprint(d2)
pprint(d1)
pprint(diff)
return diff
diffdates(diffdate... | 0 | 2016-07-31T19:43:11Z | 38,687,831 | <p>Your math is wrong. The delta between 16:00 and 11:10 is 4 hours 50 minutes. Your computation of <code>4*3600-10*60</code> is suggesting 3 hours 50 minutes. You're off by an hour.</p>
<p><code>16:00</code> is <code>60*16</code> minutes into the day: <code>960</code></p>
<p><code>11:10</code> is <code>60*11+10</... | 1 | 2016-07-31T19:49:20Z | [
"python",
"datetime"
] |
Delete first row in Dataframe each day for certain value only | 38,687,786 | <p>Is there a way to delete the first row in a Dataframe, each day, for certain value only. So for example:</p>
<pre><code>2014-03-04 10:00:00 -1.0
2014-03-04 10:04:00 1.0
2014-03-04 10:42:00 -1.0
2014-03-05 09:57:00 1.0
2014-03-05 10:05:00 -1.0
2014-03-05 10:30:00 1.0
</code></pre>
<p>For each day a... | 1 | 2016-07-31T19:43:41Z | 38,687,889 | <p>You can first <code>groupby</code> by <a href="http://pandas.pydata.org/pandas-docs/stable/generated/pandas.DatetimeIndex.year.html" rel="nofollow"><code>DatetimeIndex.year</code></a> and aggregate <a href="http://pandas.pydata.org/pandas-docs/stable/generated/pandas.core.groupby.GroupBy.head.html" rel="nofollow"><c... | 2 | 2016-07-31T19:57:59Z | [
"python",
"pandas"
] |
Delete first row in Dataframe each day for certain value only | 38,687,786 | <p>Is there a way to delete the first row in a Dataframe, each day, for certain value only. So for example:</p>
<pre><code>2014-03-04 10:00:00 -1.0
2014-03-04 10:04:00 1.0
2014-03-04 10:42:00 -1.0
2014-03-05 09:57:00 1.0
2014-03-05 10:05:00 -1.0
2014-03-05 10:30:00 1.0
</code></pre>
<p>For each day a... | 1 | 2016-07-31T19:43:41Z | 38,688,534 | <p>Here is another method of creating a mask variable using <code>apply</code> method to check each group and pick up the condition of the first element, and then use the <code>mask</code> for subsetting:</p>
<pre><code>import pandas as pd
import numpy as np
df['date_time'] = pd.to_datetime(df.date_time)
df
# ... | 0 | 2016-07-31T21:25:32Z | [
"python",
"pandas"
] |
Serialize a string without changes in Django Rest Framework? | 38,687,810 | <p>I'm using Python's json.dumps() to convert an array to a string and then store it in a Django Model. I'm trying to figure out how I can get Django's REST framework to ignore this field and send it 'as is' without serializing it a second time.</p>
<p>For example, if the model looks like this(Both fields are CharFiel... | 0 | 2016-07-31T19:46:38Z | 38,696,435 | <p>I ended up using a wasteful and sickening method of deserializing the array before serializing it again with the REST framework:</p>
<p><strong>Serializers.py:</strong></p>
<pre><code>import json
class PathWithIds(serializers.CharField):
def to_representation(self, value):
x = json.loads(value)
... | 1 | 2016-08-01T10:23:18Z | [
"python",
"json",
"django",
"serialization",
"django-rest-framework"
] |
Python, create shortcut with two paths and argument | 38,687,822 | <p>I'm trying to create a shortcut through python that will launch a file in another program with an argument. E.g:</p>
<pre><code>"C:\file.exe" "C:\folder\file.ext" argument
</code></pre>
<p>The code I've tried messing with:</p>
<pre><code>from win32com.client import Dispatch
import os
shell = Dispatch("WScript.Sh... | 3 | 2016-07-31T19:48:42Z | 38,688,725 | <pre><code>from comtypes.client import CreateObject
from comtypes.gen import IWshRuntimeLibrary
shell = CreateObject("WScript.Shell")
shortcut = shell.CreateShortCut(path).QueryInterface(IWshRuntimeLibrary.IWshShortcut)
shortcut.TargetPath = "C:\file.exe"
args = ["C:\folder\file.ext", argument]
shortcut.Arguments = "... | 2 | 2016-07-31T21:57:46Z | [
"python",
"shortcut",
"wscript"
] |
How to define zorder when using 2 y-axis? | 38,687,887 | <p>I plot using two y-axis, on the left and the right of a matplotlib figure and use <code>zorder</code> to control the position of the plots. I need to define the <code>zorder</code> <em>across</em> axes in the same figure.</p>
<hr>
<p><strong>Problem</strong></p>
<pre><code>import numpy as np
import matplotlib.pyp... | 0 | 2016-07-31T19:57:52Z | 38,688,010 | <p>It looks like the two axes have separate z-stacks. The axes are z-ordered with the most recent axis on top, so you need to move the curve you want on top to the last axis you create:</p>
<pre><code>import numpy as np
import matplotlib.pyplot as plt
x = np.arange(-10,10,0.01)
fig, ax1 = plt.subplots( 1, 1, figsize=... | 0 | 2016-07-31T20:11:44Z | [
"python",
"numpy",
"matplotlib"
] |
order list of tuples in revlex | 38,687,935 | <p>I am trying to generate the list of all k tuples on the numbers 0 through n-1, but I want this list to be ordered in revlex. For example, </p>
<pre><code>import itertools
list(itertools.combinations(range(0, 6), 3))
</code></pre>
<p>outputs these tuples in lexicographic ordering:</p>
<p>[(0, 1, 2), (0, 1, 3), (0,... | -1 | 2016-07-31T20:03:05Z | 38,688,954 | <p>Your reverse lexicographic order sorts by last item, then next-to-last, etc. One way to do that is to take the range, reverse that range, use itertools to make all combinations from that, reverse each item in that combinations list, then finally reverse the overall list. A list or tuple can be reversed by slicing wi... | 1 | 2016-07-31T22:37:46Z | [
"python",
"list",
"sorting"
] |
Remove everything besides a certain html tag and its content in Python | 38,687,974 | <p>I've search around the internet and I cannot find anything that will exclude everything besides a certain tag and its content inside it.</p>
<p>How can I do this with Python (beautifulsoup 4)?</p>
<p>I have this html:</p>
<p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="fal... | 0 | 2016-07-31T20:06:49Z | 38,688,029 | <p>Why don't locate the <code>iframe</code> and get its <em>string representation</em>:</p>
<pre><code>iframe = soup.find("iframe", class_="embed")
print(str(iframe))
</code></pre>
| 0 | 2016-07-31T20:13:52Z | [
"python",
"django",
"python-3.x"
] |
Converting a 1.2GB list of edges into a sparse matrix | 38,688,062 | <p>I have a 1.2GB list of edges from a graph in a text file. My ubuntu PC has 8GB of RAM. Each line in the input looks like</p>
<pre><code>287111206 357850135
</code></pre>
<p>I would like to convert it into a sparse adjacency matrix and output that to a file.</p>
<p>Some statistics for my data: </p>
<pre><code>Num... | 5 | 2016-07-31T20:18:19Z | 38,688,464 | <h2>Updated version</h2>
<p>As indicated in the comments, the approach did not fit your use-case. Let's make some changes:</p>
<ul>
<li>use pandas for reading in the data (instead of numpy: i'm quite surprised np.loadtxt is performing that bad!)</li>
<li>use external library <a href="http://www.grantjenks.com/docs/so... | 3 | 2016-07-31T21:16:01Z | [
"python",
"pandas",
"numpy",
"optimization",
"scipy"
] |
Converting a 1.2GB list of edges into a sparse matrix | 38,688,062 | <p>I have a 1.2GB list of edges from a graph in a text file. My ubuntu PC has 8GB of RAM. Each line in the input looks like</p>
<pre><code>287111206 357850135
</code></pre>
<p>I would like to convert it into a sparse adjacency matrix and output that to a file.</p>
<p>Some statistics for my data: </p>
<pre><code>Num... | 5 | 2016-07-31T20:18:19Z | 38,692,211 | <p>You might want to take a look at the <a href="http://igraph.org/python/" rel="nofollow">igraph</a> project, this is a GPL library of C code which is designed for this kind of thing, and has a nice Python API. I think in your case you the Python code would be something like </p>
<pre><code>from igraph import Graph
g... | 0 | 2016-08-01T06:25:36Z | [
"python",
"pandas",
"numpy",
"optimization",
"scipy"
] |
Converting a 1.2GB list of edges into a sparse matrix | 38,688,062 | <p>I have a 1.2GB list of edges from a graph in a text file. My ubuntu PC has 8GB of RAM. Each line in the input looks like</p>
<pre><code>287111206 357850135
</code></pre>
<p>I would like to convert it into a sparse adjacency matrix and output that to a file.</p>
<p>Some statistics for my data: </p>
<pre><code>Num... | 5 | 2016-07-31T20:18:19Z | 38,734,771 | <p>Here's my solution:</p>
<pre><code>import numpy as np
import pandas as pd
import scipy.sparse as ss
def read_data_file_as_coo_matrix(filename='edges.txt'):
"Read data file and return sparse matrix in coordinate format."
data = pd.read_csv(filename, sep=' ', header=None, dtype=np.uint32)
rows = data[0] ... | 5 | 2016-08-03T05:04:02Z | [
"python",
"pandas",
"numpy",
"optimization",
"scipy"
] |
Converting a 1.2GB list of edges into a sparse matrix | 38,688,062 | <p>I have a 1.2GB list of edges from a graph in a text file. My ubuntu PC has 8GB of RAM. Each line in the input looks like</p>
<pre><code>287111206 357850135
</code></pre>
<p>I would like to convert it into a sparse adjacency matrix and output that to a file.</p>
<p>Some statistics for my data: </p>
<pre><code>Num... | 5 | 2016-07-31T20:18:19Z | 38,770,170 | <p>In my answer I consider the case where the ids of the nodes are given by 9 characters long strings each character from <code>[0-9A-Za-z]</code>. <code>n</code> of these node ids should be mapped on the values <code>[0,n-1]</code> (which might be not necessary for your application, but still of general interest).</p>... | 2 | 2016-08-04T14:26:36Z | [
"python",
"pandas",
"numpy",
"optimization",
"scipy"
] |
Converting a 1.2GB list of edges into a sparse matrix | 38,688,062 | <p>I have a 1.2GB list of edges from a graph in a text file. My ubuntu PC has 8GB of RAM. Each line in the input looks like</p>
<pre><code>287111206 357850135
</code></pre>
<p>I would like to convert it into a sparse adjacency matrix and output that to a file.</p>
<p>Some statistics for my data: </p>
<pre><code>Num... | 5 | 2016-07-31T20:18:19Z | 38,780,599 | <p>I was trying the different methods available apart from the ones already used. I found the following doing good.</p>
<p>Method 1 - Reading the file into a string, parsing the string into a 1-D array using numpy's fromstring.</p>
<pre><code>import numpy as np
import scipy.sparse as sparse
def readEdges():
with... | 3 | 2016-08-05T03:26:08Z | [
"python",
"pandas",
"numpy",
"optimization",
"scipy"
] |
output a dataframe to a json array | 38,688,072 | <p>I was wondering if there was a more efficient way to do the following operation.</p>
<pre><code># transforms datetime into timestamp in seconds
t = df.index.values.astype(np.int64) // 10**6
return jsonify(np.c_[t, df.open, df.high, df.low, df.close, df.volume].tolist())
</code></pre>
<p>where <code>df</code> is a... | 2 | 2016-07-31T20:20:07Z | 38,688,136 | <p>you can use <a href="http://pandas.pydata.org/pandas-docs/stable/generated/pandas.DataFrame.to_json.html" rel="nofollow">to_json()</a> method:</p>
<pre><code>In [88]: import pandas_datareader.data as web
In [89]: apl = web.get_data_yahoo('AAPL', '2016-07-05', '2016-07-07')
In [90]: apl
Out[90]:
O... | 5 | 2016-07-31T20:29:24Z | [
"python",
"json",
"pandas",
"numpy",
"dataframe"
] |
Why is this invalid syntax? (Class function) | 38,688,097 | <p>The code I am trying to enter (python) looks like this:</p>
<pre><code>class RainfallTable:
def _init_ (self, njrainfall.txt):
self.njrainfall.txt = open(njrainfall.txt, 'r')
def close(self):
if self.t:
self.t.close()
self.t = None
</code></pre>
<p>I am trying to get... | 0 | 2016-07-31T20:24:41Z | 38,688,121 | <p>Function/constructor should have only variables as input</p>
<p>You can pass text file name along with path to that init function</p>
<p>Better you pass text file with absolute path</p>
<pre><code>class RainfallTable:
def _init_ (self, textfile):
self.t = open(textfile, 'r')
def close(self):
... | 0 | 2016-07-31T20:27:44Z | [
"python",
"class"
] |
Why is this invalid syntax? (Class function) | 38,688,097 | <p>The code I am trying to enter (python) looks like this:</p>
<pre><code>class RainfallTable:
def _init_ (self, njrainfall.txt):
self.njrainfall.txt = open(njrainfall.txt, 'r')
def close(self):
if self.t:
self.t.close()
self.t = None
</code></pre>
<p>I am trying to get... | 0 | 2016-07-31T20:24:41Z | 38,688,127 | <p>You've got a <code>.</code> in your variable names, which is invalid syntax for python. Remove those in your <code>njrainfall.txt</code> variables. A good substitute would be <code>njrainfall_file</code> or something similar. Secondly, the init functions is written with two underscores, like so:</p>
<pre><code>def ... | 3 | 2016-07-31T20:28:32Z | [
"python",
"class"
] |
Why is this invalid syntax? (Class function) | 38,688,097 | <p>The code I am trying to enter (python) looks like this:</p>
<pre><code>class RainfallTable:
def _init_ (self, njrainfall.txt):
self.njrainfall.txt = open(njrainfall.txt, 'r')
def close(self):
if self.t:
self.t.close()
self.t = None
</code></pre>
<p>I am trying to get... | 0 | 2016-07-31T20:24:41Z | 38,688,224 | <p>It looks like you are confused with strings, parameter/variable names, and class objects.</p>
<p>The dot you are using in what must be a variable name (<code>njrainfall.txt</code>) looks like either a string with an actual file name, or an object attribute.</p>
<p>As other people have pointed out already, you shal... | 0 | 2016-07-31T20:42:01Z | [
"python",
"class"
] |
Why is this invalid syntax? (Class function) | 38,688,097 | <p>The code I am trying to enter (python) looks like this:</p>
<pre><code>class RainfallTable:
def _init_ (self, njrainfall.txt):
self.njrainfall.txt = open(njrainfall.txt, 'r')
def close(self):
if self.t:
self.t.close()
self.t = None
</code></pre>
<p>I am trying to get... | 0 | 2016-07-31T20:24:41Z | 38,690,150 | <p>Remove the fullstop here <pre>self.njrainfall.txt</pre>
to something else.</p>
<p>Like</p>
<pre>self.njrainfall</pre>
| 0 | 2016-08-01T02:17:21Z | [
"python",
"class"
] |
Python: Elements in a list not being changed? | 38,688,116 | <p>I'm having issues with editing elements in a list in Python, I've got the following code: </p>
<pre><code>mylist = ["one", "day", "soon"]
for x in mylist:
x = "New word"
print(x)
print(mylist)
</code></pre>
<p>I would expect the output to be "New Word" three times (once for each iteration) and then a lis... | 0 | 2016-07-31T20:26:34Z | 38,688,123 | <p>The problem is that when you iterate with <code>for x in mylist</code> and then assign a value to <code>x</code>, you are creating a new variable called <code>x</code> and that is what you are printing. You cannot change the list in that way, only by iterating like this:</p>
<pre><code>for i in range(len(mylist)):
... | 2 | 2016-07-31T20:28:00Z | [
"python",
"list",
"python-3.x"
] |
How to parse text from a html table element | 38,688,137 | <p>I'm currently writing a small test webscraper using the python requests and lxml libraries. I'm trying to extract the text from the rows of a table from <a href="https://en.wikipedia.org/wiki/Game_of_Thrones" rel="nofollow">this site</a> using xpaths to uniquely identify the table. Since the table itself can only be... | 2 | 2016-07-31T20:29:28Z | 38,688,170 | <p>The <code>wikitable</code> is too broad of a class to distinguish tables on a wiki page between one another.</p>
<p>I would instead rely on the preceding <code>Adaptation schedule</code> label:</p>
<pre><code>import requests
from lxml.html import fromstring
url = "https://en.wikipedia.org/wiki/Game_of_Thrones"
re... | 2 | 2016-07-31T20:33:55Z | [
"python",
"html",
"xpath",
"python-requests",
"lxml"
] |
[RESOLVED]Get all files from my C drive - Python | 38,688,228 | <p>Here is what I try to do:
I would like to get a list of all files that are heavier than 35 MB in my C drive.</p>
<p>Here is my code:</p>
<pre><code>def getAllFileFromDirectory(directory, temp):
files = os.listdir(directory)
for file in files:
if (os.path.isdir(file)):
getAllFileFromDir... | 0 | 2016-07-31T20:42:16Z | 38,688,311 | <p>I fixed your code. Your problem was that <code>os.path.isdir</code> can only know if something is a directory if it receives the full path of it. So, I changed the code to the following and it works. Same thing for <code>os.path.getsize</code> and <code>os.path.isfile</code>.</p>
<pre><code>import os
def getAllFil... | 1 | 2016-07-31T20:52:18Z | [
"python",
"windows",
"python-2.7",
"python-3.x"
] |
How to return tuples and count from list using list comprehension | 38,688,254 | <p>I have a function which, using list comprehension, returns the list elements in caps, and counts each element. </p>
<pre><code>def wordlengths(mywords):
upperword = [word.upper() for word in mywords]
lenword = [len(i) for i in mywords]
return upperword, lenword
print(wordlengths(["The", "quick", "brown"... | 0 | 2016-07-31T20:45:18Z | 38,688,271 | <p>You can use <a href="https://docs.python.org/3/library/functions.html#zip" rel="nofollow"><code>zip()</code></a>:</p>
<pre><code>def wordlengths(mywords):
upperword = [word.upper() for word in mywords]
lenword = [len(i) for i in mywords]
return list(zip(upperword, lenword))
</code></pre>
<p>But, why do... | 4 | 2016-07-31T20:46:46Z | [
"python",
"list",
"python-3.x",
"list-comprehension"
] |
Assert Error is thrown when mocking python3 | 38,688,258 | <p>I am trying to write a test that mocks raising <code>PermissionError</code> on a call to <code>open()</code> when attempting to open a file for reading. However I cannot seem to get the test working. The <code>PermissionError</code> appears to be thrown but my test fails because of this even though I am trying to as... | 0 | 2016-07-31T20:45:45Z | 38,688,291 | <p>The reason this will not work is because you are mocking <code>fileMethods.open</code> and so the <code>open</code> function (which raises the <code>PermissionError</code> you're looking for) is not even called.</p>
<p>If the <code>open</code> function is mocked (and therefore, the called function will do nothing),... | 0 | 2016-07-31T20:49:12Z | [
"python",
"unit-testing",
"mocking"
] |
Python string not printing properly in PowerShell | 38,688,328 | <p>I'm having difficulty parsing data with a lot of scientific and international symbols using Python 2.7 so I wrote a toy program that illustrates what is not making sense to me: </p>
<pre><code>#!/usr/bin/python
# coding=utf-8
str ="35 μg/m3"
str = str.decode('utf-8')
str = str.encode('utf-8') #ready for printing?... | 0 | 2016-07-31T20:54:28Z | 38,688,754 | <p>The line <code># coding=utf-8</code> only helps to write unicode literal and is no use for plain byte strings. Anyway assuming that your Python file is UTF-8 encoded, the line <code>str = str.decode('utf-8')</code> gives you a correct unicode string.</p>
<p>But as said by Ansgar Wiechers, as you declare your encodi... | 0 | 2016-07-31T22:02:58Z | [
"python",
"powershell",
"unicode",
"encoding"
] |
Python string not printing properly in PowerShell | 38,688,328 | <p>I'm having difficulty parsing data with a lot of scientific and international symbols using Python 2.7 so I wrote a toy program that illustrates what is not making sense to me: </p>
<pre><code>#!/usr/bin/python
# coding=utf-8
str ="35 μg/m3"
str = str.decode('utf-8')
str = str.encode('utf-8') #ready for printing?... | 0 | 2016-07-31T20:54:28Z | 38,688,846 | <p>Python 2.7 doesn't use Unicode strings by default, so you basically have 2 options:</p>
<ul>
<li><p>Define the string as a Unicode string literal (<code>u"..."</code>):</p>
<pre><code># coding=utf-8
str = u"35 µg/m3"
print(str)
</code></pre>
<p>This way you can simply use the string as one would expect, so I'd p... | 0 | 2016-07-31T22:20:14Z | [
"python",
"powershell",
"unicode",
"encoding"
] |
Python string not printing properly in PowerShell | 38,688,328 | <p>I'm having difficulty parsing data with a lot of scientific and international symbols using Python 2.7 so I wrote a toy program that illustrates what is not making sense to me: </p>
<pre><code>#!/usr/bin/python
# coding=utf-8
str ="35 μg/m3"
str = str.decode('utf-8')
str = str.encode('utf-8') #ready for printing?... | 0 | 2016-07-31T20:54:28Z | 38,702,903 | <p>Your decoding/encoding has no effect:</p>
<pre><code># coding=utf-8
s1 = "35 μg/m3"
s2 = s1.decode('utf-8')
s3 = s2.encode('utf-8') #ready for printing?
print s1==s3
</code></pre>
<p>If your source is UTF-8 as declared, then <code>s1</code> is a byte string that is UTF-8-encoded already. Decoding it to a Unicod... | 0 | 2016-08-01T15:40:11Z | [
"python",
"powershell",
"unicode",
"encoding"
] |
Add a delay after 500 requests scrapy | 38,688,347 | <p>I have a list of start 2000 urls and I'm using:</p>
<pre><code>DOWNLOAD_DELAY = 0.25
</code></pre>
<p>For controlling the speed of the requests, But I also want to add a bigger delay after n requests.
For example, I want a delay of 0.25 seconds for each request and a delay of 100 seconds each 500 requests.</p>
... | 1 | 2016-07-31T20:57:30Z | 38,688,378 | <p>You can look into using an <a href="http://doc.scrapy.org/en/latest/topics/autothrottle.html" rel="nofollow">AutoThrottle extension</a> which does not give you a tight control of the delays but instead has its own algorithm of slowing down the spider adjusting it on the fly depending on the response time and number ... | 1 | 2016-07-31T21:03:43Z | [
"python",
"web-scraping",
"scrapy"
] |
How Can I check if my rectangle(coin) has collided with my chest? | 38,688,409 | <p>I am currently making a game in pygame.What I am trying to do is check if my rectangle(a yellow coin blitted on it) collides with my chest image.If it does what the program should do is reset the yellow coin back to its initial position of y axis( showed later in here). </p>
<p>This is my function to create rectan... | 0 | 2016-07-31T21:08:59Z | 38,689,115 | <p>What you probably want is <code>pygame.Rect.collide_rect()</code>. It returns <code>True</code> if two rects collided. You first want to put your coin and your treasure chest dimensions in a <code>pygame.Rect</code> object. I'll use your coin rect as a example: <code>coin_rect = pygame.Rect(thingx,thingy,thingw,thi... | 0 | 2016-07-31T23:07:18Z | [
"python",
"image",
"python-2.7",
"pygame",
"rect"
] |
AttributeError for function called in another function within same class - Python | 38,688,414 | <p>When I run the following code I get an AttributeError: 'set' object has no attribute findMean. What am I doing wrong?</p>
<pre><code>class BasicStats:
def findMean(self, num = {}):
length = len(num)
sum = 0
for x in num:
sum = sum + x
mean =sum/length
r... | 1 | 2016-07-31T21:09:49Z | 38,688,436 | <p>It's because <code>self</code> in that scope is a <code>set</code>. More specifically, it is <code>arr</code> (which is a set and you pass in as the first argument).</p>
<p>The <code>self</code> keyword only works for functions called against an instance of a class (this special type of functions are called methods... | 3 | 2016-07-31T21:11:44Z | [
"python"
] |
django use models variable in template | 38,688,432 | <p>I would like to use the values in a choices field in my template. Suppose I had the class:</p>
<pre><code>MY_CHOICES = (
('A1', 'The best steak sauce'),
('B2', 'Very stealthy'),
('C3', 'Missing a P0'))
class MyClass(models.Model):
my_field = models.CharField(max_length = 2, choices = MY_CHOICES)
</... | 2 | 2016-07-31T21:11:23Z | 38,688,646 | <p><strong>EDIT:</strong> Added a new solution since the first was only about a line the author Woody1193 forgot to mention but implemented it already.</p>
<p><strong>NEW:</strong></p>
<p>I have actually had a similar problem and solved it by creating a custom POST function in javascript.</p>
<p>Copied from <a href=... | -1 | 2016-07-31T21:44:27Z | [
"python",
"django"
] |
django use models variable in template | 38,688,432 | <p>I would like to use the values in a choices field in my template. Suppose I had the class:</p>
<pre><code>MY_CHOICES = (
('A1', 'The best steak sauce'),
('B2', 'Very stealthy'),
('C3', 'Missing a P0'))
class MyClass(models.Model):
my_field = models.CharField(max_length = 2, choices = MY_CHOICES)
</... | 2 | 2016-07-31T21:11:23Z | 38,694,920 | <p>the simplest solution of this problem is, You should create a file forms.py in a same directory where models.py is locaed and write this code into the file:</p>
<p><strong>forms.py</strong></p>
<pre><code>from models import MyClass
from django import forms
class MyForm(forms.ModelForm):
class Meta:
mod... | 1 | 2016-08-01T09:09:15Z | [
"python",
"django"
] |
Adding a text input dialogue box in psychopy using python? | 38,688,451 | <p>I am using psychopy and python to program a simple psychology experiment. Basically, a foreign word appears on the screen for 8 seconds, followed by 5 seconds of a translation of that word. During the 8 second exposure to the foreign word, participants are instructed to type in a guess as to what the translation m... | 0 | 2016-07-31T21:13:48Z | 38,722,662 | <p>I made something similar to what you are describing a while back. Perhaps this will help. You first have some TextStim, and some predefined keys:</p>
<pre><code>instruction = psychopy.visual.TextStim(myWindow,color="white")
quitKeys = ['escape', 'esc']
ansKeys = ['space', 'return']
keyboardKeys = ['a','b','c','d','... | 1 | 2016-08-02T14:02:53Z | [
"python",
"psychopy"
] |
Dictionary Sorting based on lower dictionary value | 38,688,455 | <p>I am working with an API that returns values in this format:</p>
<pre><code>raw = [{'Name': 'Erica','Value':12},{'Name':'Sam','Value':8},{'Name':'Joe','Value':60}]
</code></pre>
<p>I am trying to return the 'name' of the people with the top 2 'values':</p>
<pre><code>result = ['Joe','Erica']
</code></pre>
<p>Wha... | -6 | 2016-07-31T21:14:22Z | 38,688,474 | <pre><code>raw = [{'Name': 'Erica','Value':12},{'Name':'Sam','Value':8},{'Name':'Joe','Value':60}]
raw.sort(key=lambda d: d['Value'], reverse=True)
result = []
for i in range(2):
result.append(raw[i]['Name'])
print(result) # => ['Joe', 'Erica']
</code></pre>
<p>print(result)</p>
<p>Try this.</p>
| -1 | 2016-07-31T21:17:08Z | [
"python",
"dictionary"
] |
Converting and writing list of strings as binary in Python 3 | 38,688,488 | <p>I'm trying to convert a Python 2.x version of this code:</p>
<pre><code>out_chunk = open('out.txt','w+b')
chunks.append(out_chunk) # out_chunk is just a list of strings like ['a', 'b', ...]
out_chunk.writelines(chunk)
</code></pre>
<p>into Python 3.x version. If I run the above code in Python 3.x directly, I get a... | 0 | 2016-07-31T21:18:43Z | 38,688,521 | <p>Just don't open the file in binary mode:</p>
<pre><code>out_chunk = open('out.txt','w+')
</code></pre>
<p>Hope it helps!</p>
| 1 | 2016-07-31T21:23:31Z | [
"python",
"python-2.7",
"python-3.x",
"io"
] |
Converting and writing list of strings as binary in Python 3 | 38,688,488 | <p>I'm trying to convert a Python 2.x version of this code:</p>
<pre><code>out_chunk = open('out.txt','w+b')
chunks.append(out_chunk) # out_chunk is just a list of strings like ['a', 'b', ...]
out_chunk.writelines(chunk)
</code></pre>
<p>into Python 3.x version. If I run the above code in Python 3.x directly, I get a... | 0 | 2016-07-31T21:18:43Z | 38,688,648 | <p>You opened the file in <em>binary</em> mode, so you'd have to encode your bytes.</p>
<p>If you drop the <code>'b'</code> part from the file mode (so open with <code>'w+'</code> rather than <code>'w+b'</code>), you get an implementation of the <a href="https://docs.python.org/3/library/io.html#io.TextIOBase" rel="no... | 3 | 2016-07-31T21:44:32Z | [
"python",
"python-2.7",
"python-3.x",
"io"
] |
Dataframe manipulation and aggregation | 38,688,502 | <p>I have the following dataframe </p>
<pre><code> City Status q1 q2 Record
0 Austin Standard N Y Active
1 Dallas Standard N y Active
2 Orlando Standard N N Active
3 Orlando Ex Y Y Inactive
4 Orlando Standard N N Active
</code></pre>
<p>I'm tryi... | -2 | 2016-07-31T21:20:13Z | 38,688,579 | <p>you can do it this way:</p>
<pre><code>In [159]: df.q1 = 'Q1 = ' + df.q1.str.upper()
In [160]: df.q2 = 'Q2 = ' + df.q2.str.upper()
In [161]: df
Out[161]:
City Status q1 q2 Record
0 Austin Standard Q1 = N Q2 = Y Active
1 Dallas Standard Q1 = N Q2 = Y Active
2 Orlando Standar... | 1 | 2016-07-31T21:31:31Z | [
"python",
"pandas"
] |
Notepad++ or python - Compare two lists and change the original changed | 38,688,542 | <p>I have this original list.</p>
<pre><code>John:password123
Daved:Password123
Steve:Password123
Michael:Password123
</code></pre>
<hr>
<p>The second list is a random of original list and with changed passwords.</p>
<pre><code>Michael:p241d111
John:fcvbfdg122
Steve:pdPo134!
</code></pre>
<p>What I want is to chan... | -1 | 2016-07-31T21:26:40Z | 38,688,654 | <p><strong>test.txt</strong></p>
<pre><code>John:password123
Daved:Password123
Steve:Password123
Michael:Password123
</code></pre>
<p><strong>test2.txt</strong></p>
<pre><code>Michael:p241d111
John:fcvbfdg122
Steve:pdPo134!
</code></pre>
<p><strong>script.py</strong></p>
<pre><code>lst = {}
with open("test.txt") ... | 0 | 2016-07-31T21:46:22Z | [
"python",
"regex",
"list",
"compare",
"notepad++"
] |
What do the keywords in the eventful api map to? | 38,688,666 | <p>I have been trying to setup the eventful api using python. The following example is all the documentation I could find on the it:</p>
<pre><code>import eventful
api = eventful.API('your API key here')
# If you need to log in:
# api.login('username', 'password')
events = api.call('/events/search', q='music', l='... | 0 | 2016-07-31T21:47:39Z | 38,688,691 | <p>Just found out what the args stood for,
this link has them:</p>
<p><a href="http://api.eventful.com/tools/tutorials/search" rel="nofollow">http://api.eventful.com/tools/tutorials/search</a></p>
<p><em>What: The 'what' argument, also called <strong>'q'</strong> or 'keywords', is used to search by any aspect of an e... | 0 | 2016-07-31T21:51:17Z | [
"python"
] |
Sublime Text3 creates Scripts inside Scripts folder inside virtualenv | 38,688,707 | <p>I'm trying to run Python scripts inside virtualenv from Sublime Text 3. When I activate the virtualenv in ST3 and choose the <code>.py</code>, ST3 creates a <code>Scripts</code> folder inside the preexisting <code>Scripts</code> folder (for a new `.py'). What is causing this problem and how I do stop this from happe... | 0 | 2016-07-31T21:54:39Z | 38,689,463 | <p>Solved. In ST3, use <code>Virtualenv: Add Directory</code> instead of <code>Virtualenv: New</code>. The latter creates a new virtualenv (hence the new Scripts folder).</p>
| 0 | 2016-08-01T00:10:40Z | [
"python",
"python-2.7",
"sublimetext3",
"virtualenv"
] |
change specific parts of a string in python (update bootstrap values in phylogenetic trees) | 38,688,721 | <p>So basically I have a string:</p>
<pre><code>string_1 = '(((A,B)123,C)456,(D,E)789)135'
</code></pre>
<p>Containing a phylogenetic tree with bootstrap values is parenthetical notation (not really important to the question, but in case anyone was wondering). This example tree contains four relationships with four b... | 3 | 2016-07-31T21:57:14Z | 38,725,131 | <p>This is a solution using Biopython. First you need to load your trees. If you're using strings, you'll need to load then first as <code>StringIO</code>, as the Parser only accepts file handles:</p>
<pre><code>from io import StringIO
from Bio.Phylo.NewickIO import Parser
string_1 = u'(((A,B)123,C)456,(D,E)789)135' ... | 1 | 2016-08-02T15:48:55Z | [
"python",
"biopython",
"statistics-bootstrap",
"phylogeny"
] |
the efficient approach to generate submatrices | 38,688,745 | <p>The following is a function that can return sub-matries from two given matries. The position of generating these sub-matries are the same for both input matries. The input matries are of <code>Numpy array</code>. I just would like to know are there more elegant ways to fulfill the same type of task as this function ... | 0 | 2016-07-31T22:01:22Z | 38,688,803 | <p>As an alternative approach, we could create the indexing ranges with <a href="http://docs.scipy.org/doc/numpy/reference/generated/numpy.ix_.html" rel="nofollow"><code>np.ix_</code></a> and index into the input arrays with those, like so -</p>
<pre><code>idx = np.ix_(np.arange(size)+dim1,np.arange(size)+dim2)
out = ... | 0 | 2016-07-31T22:10:06Z | [
"python",
"numpy",
"scipy"
] |
the efficient approach to generate submatrices | 38,688,745 | <p>The following is a function that can return sub-matries from two given matries. The position of generating these sub-matries are the same for both input matries. The input matries are of <code>Numpy array</code>. I just would like to know are there more elegant ways to fulfill the same type of task as this function ... | 0 | 2016-07-31T22:01:22Z | 38,695,437 | <p>You likely want to do <code>rowN, colN = ma1.shape</code> instead of</p>
<p>rowN = len(ma1)<br>
colN = len(ma1[0]) </p>
<p>Also, you might want to seed your random number generator.</p>
| 0 | 2016-08-01T09:32:56Z | [
"python",
"numpy",
"scipy"
] |
Daylight savings time for GPX and PostgreSQL | 38,688,752 | <p>So here I'm working with gpx files. Take note of an excerpt of one:</p>
<pre><code><?xml version="1.0" encoding="UTF-8"?>
<!-- GPSTrack 2.2.1 â http://bafford.com/gpstrack -->
<gpx xmlns="http://www.topografix.com/GPX/1/1">
<trk>
<name><![CDATA[2016-03-31 10-17-54]]></name&g... | 0 | 2016-07-31T22:02:56Z | 38,690,354 | <p>If you <em>know</em> the <strong><em>time zone name</em></strong> where this local time is supposed to be set in (assuming <em>'Europe/Vienna'</em> in the example), you can normalize the value to correct UTC time (or <em>any</em> other time zone) with this expression:</p>
<pre><code>SELECT '2016-03-31T09:17:51Z'::t... | 0 | 2016-08-01T02:50:24Z | [
"python",
"xml",
"postgresql",
"time",
"dst"
] |
handling large integers in for loop optimized in python | 38,688,780 | <p>I'm reading a large csv file (500 000 rows) and adding every row in a dict.
One example row is: </p>
<p><code>6AH8,F,B,0,60541765,60541765,90.52,1</code></p>
<p>index 4 - <code>60541765</code> and index 5 - <code>60541765</code>in this case is the same, but it is not always the case. These integers are timestamps ... | 0 | 2016-07-31T22:06:49Z | 38,688,928 | <p>Your issue is likely that checking whether a number is in a List in python is an O(n) operation, which will need to be performed for every row in your large dataset, meaning a total of O(n^2) algorithm, which is enormous on 500,000 entries.</p>
<p>My suggestion would be to add a bit of space complexity O(n) to save... | 1 | 2016-07-31T22:34:02Z | [
"python",
"for-loop",
"optimization",
"integer",
"iteration"
] |
Copy value from matching index in another dataframe after criteria matched | 38,688,784 | <p>With the test Pandas dataframe below I am trying to copy a value from matching index in another dataframe after certain criteria is matched.</p>
<p>This is a snip from the dataframe called <code>data2</code>:</p>
<pre><code> Signal Value2
2013-01-01 09:00:00 1.0 NaN
2013-01-01 10:00:00 1.0 NaN
2013... | 0 | 2016-07-31T22:07:16Z | 38,688,970 | <p>Could be something like this?</p>
<pre><code>data2.loc[data2.Signal == -1, 'Value2'] = data.loc[data2.Signal == -1, 'value']
</code></pre>
| 1 | 2016-07-31T22:40:50Z | [
"python",
"pandas"
] |
django deleteview NoReverseMatch at | 38,688,793 | <p>I am new to Django.
I keep receiving NoReverseMatch when building an app. Was wondering if someone can point me in the right direction as to where I am going wrong. </p>
<p>The app has scenarios, each scenario has associated emailss. When I click on a scenario the app displays the emails associated to the scenari... | 0 | 2016-07-31T22:08:58Z | 38,690,928 | <p><code>email-delete</code> URL has two capture groups - one non-named <code>([0-9]+)</code> and one named <code>(?P<pk>[0-9]+)</code>, but in the <code>url</code> tag you pass only positional argument - <code>email.id</code>. You must either remove the first group from url pattern or pass two arguments to <code... | 0 | 2016-08-01T04:14:11Z | [
"python",
"django"
] |
How to implement multithreading with tornado? | 38,688,816 | <p>I am working with python2.7 with futures module installed.</p>
<p>I am trying to implement multithreading in tornado using ThreadPoolExecutor. </p>
<p>Here is the code that I have implemented.</p>
<pre><code>from __future__ import absolute_import
from base_handler import BaseHandler
from tornado import gen
from p... | 0 | 2016-07-31T22:13:45Z | 38,701,789 | <p>It appears that <code>m.operation()</code> is blocking, so you need to run it on a thread. The way you're doing it blocks the main thread while calling <code>m.operation()</code>, and spawns a thread <em>after</em>:</p>
<pre><code>self.executor.submit(m.operation())
</code></pre>
<p>You want, instead, to pass the ... | 1 | 2016-08-01T14:44:58Z | [
"python",
"multithreading",
"asynchronous",
"tornado"
] |
regular expression for shortest match in Python 2.7 | 38,688,827 | <p>I am using Python 2.7. The current code returns <code>hello }{(2) world</code>. If I only want the shortest match, in this case <code>hello</code>, what is the solution in Python 2.7?</p>
<pre><code>import re
content = '{(1) hello }{(2) world}'
reg = '{\(1\)(.*)}'
results = re.findall(reg, content)
print results[0... | 0 | 2016-07-31T22:16:10Z | 38,688,836 | <p>Make the wildcard match <a href="http://stackoverflow.com/questions/2301285/what-do-lazy-and-greedy-mean-in-the-context-of-regular-expressions"><em>non-greedy</em></a>:</p>
<pre><code>>>> reg = r'{\(1\)(.*?)}'
# this ? is important^
>>> results = re.findall(reg, content)
>>> print results... | 3 | 2016-07-31T22:18:14Z | [
"python",
"regex",
"python-2.7"
] |
regular expression for shortest match in Python 2.7 | 38,688,827 | <p>I am using Python 2.7. The current code returns <code>hello }{(2) world</code>. If I only want the shortest match, in this case <code>hello</code>, what is the solution in Python 2.7?</p>
<pre><code>import re
content = '{(1) hello }{(2) world}'
reg = '{\(1\)(.*)}'
results = re.findall(reg, content)
print results[0... | 0 | 2016-07-31T22:16:10Z | 38,690,961 | <p>For this kind of situation negated character class will also help you.</p>
<pre><code>reg = r'{\(1\)([^}]*)}'
results = re.findall(reg, content)
print results[0]
</code></pre>
| 0 | 2016-08-01T04:18:54Z | [
"python",
"regex",
"python-2.7"
] |
how to create new variable from loop index in python | 38,688,865 | <p>i have the following sort of code</p>
<pre><code> ps=[1,2,3,4]
for subj in ps:
num=num+1
datapath='/home/subj%d' %(int(subj))
if num==1:
d1= pd.read_csv(datapath, 'words.csv')
if num==2:
d2= pd.read_csv(datapath, 'words.csv')
if num==3:
d3= pd.read_csv(datapath, ... | 0 | 2016-07-31T22:23:34Z | 38,688,887 | <p>Just do this:</p>
<pre><code>paths = map('/home/subj{}'.format, ps)
datas = map(pd.read_csv, paths)
</code></pre>
<p>Now you have a list of DataFrames, but if you want separate variables, you can:</p>
<pre><code>d1, d2, d3, d4 = datas
</code></pre>
| 0 | 2016-07-31T22:27:02Z | [
"python"
] |
how to create new variable from loop index in python | 38,688,865 | <p>i have the following sort of code</p>
<pre><code> ps=[1,2,3,4]
for subj in ps:
num=num+1
datapath='/home/subj%d' %(int(subj))
if num==1:
d1= pd.read_csv(datapath, 'words.csv')
if num==2:
d2= pd.read_csv(datapath, 'words.csv')
if num==3:
d3= pd.read_csv(datapath, ... | 0 | 2016-07-31T22:23:34Z | 38,688,889 | <p>Create a list and append the data.</p>
<pre><code>ps=[1,2,3,4]
d = []
for subj in ps:
datapath = '/home/subj%d' % (subj)
d.append(pd.read_csv(datapath, 'numbers.csv'))
</code></pre>
<p>You can access the data with <code>d[0]</code> to <code>d[3]</code>.</p>
<p>Using a list comprehension will lead to the f... | 4 | 2016-07-31T22:27:21Z | [
"python"
] |
Seaborn OS X : seaborn.pairplot() ValueError: 'transform' must be an instance of 'matplotlib.transform.Transform' | 38,688,881 | <p>The following steps were taken inside of jupyter notebook in an attempt to make <code>seaborn.pairplot()</code> work. An error from <code>/usr/local/lib/python2.7/site-packages/matplotlib/matplotlib/transforms.pyc</code> stopped the function from working.</p>
<p>Below are the python library versions:</p>
<pre><cod... | 3 | 2016-07-31T22:25:58Z | 38,708,506 | <p>So I am answering my own question now.</p>
<p>I solved the problem by using a Macports virtual environment</p>
<pre><code>sudo port selfupdate
sudo port install python27
sudo port install py27-virtualenv
/opt/local/bin/virtualenv-2.7 $HOME/local/python/27
</code></pre>
<p>Add to .bash_profile:</p>
<pre><code>a... | 0 | 2016-08-01T21:35:49Z | [
"python",
"matplotlib",
"seaborn"
] |
Python Minimalmodbus sending value | 38,688,893 | <p>I need to control the speed of a VSD via Modbus using Python.
I have all working accept one part and that is to send the speed of the VSD.</p>
<p>If I send this command the motor will start</p>
<pre><code> vsd.write_register(8192 , 2 , 0)
</code></pre>
<p>And this command will let it stop </p>
<pre><code> vsd.wr... | 0 | 2016-07-31T22:28:09Z | 38,704,134 | <p>You have to set the functioncode = 6. Then it sends the correct bytes.</p>
| 0 | 2016-08-01T16:51:14Z | [
"python",
"modbus"
] |
python 2.7 Regex for a range of numbers | 38,688,899 | <p>What is the regular expression to return a number in the range 274-342 and the rest of the line until '\n'? Here is my attempt.</p>
<pre><code>import re
text = '333get\n361donuts\n400chickenmcsandwich\n290this\n195foo\n301string'
match=re.findall(r'(27[4-9]|8[0-9]|9[0-9]|3[0-3]\d|4[0-2])(.*)', text)
</code></pre>
... | -5 | 2016-07-31T22:29:32Z | 38,792,879 | <p>You can use <code>'(\d+)(.*)'</code> and then filter the list:</p>
<pre><code>import re
text = '333get\n361donuts\n400chickenmcsandwich\n290this\n195foo\n301string'
matches = re.findall(r'(\d+)(.*)', text)
matches = [ item for item in matches if int(item[0]) in range(274,342) ]
print(matches)
# should print : [('33... | 1 | 2016-08-05T15:29:40Z | [
"python",
"regex"
] |
Python - get combination of data from array of arrays | 38,688,982 | <p>I have an array which holds other arrays which are holding possible values of data at given position. Example: </p>
<pre><code>data = [['A'],['A','B'],['A','B'],['A','B','D'],['0','2']]
</code></pre>
<p>From this data possible values are (for example): </p>
<pre><code>"AAAA0" # (00000)
"AAAA2" # (00001) ... | 0 | 2016-07-31T22:43:21Z | 38,689,025 | <p>Try this:</p>
<pre><code>data = [['A'], ['A','B'], ['A','B'], ['A','B','D'], ['0','2']]
size = 5
def rec(cur):
if len(cur) == size:
print(cur)
return
for x in data[len(cur)]:
rec(cur + [x])
rec([])
</code></pre>
<p>Output:</p>
<pre><code>['A', 'A', 'A', 'A', '0']
['A', 'A', 'A',... | 0 | 2016-07-31T22:50:35Z | [
"python",
"arrays",
"combinations"
] |
Python - get combination of data from array of arrays | 38,688,982 | <p>I have an array which holds other arrays which are holding possible values of data at given position. Example: </p>
<pre><code>data = [['A'],['A','B'],['A','B'],['A','B','D'],['0','2']]
</code></pre>
<p>From this data possible values are (for example): </p>
<pre><code>"AAAA0" # (00000)
"AAAA2" # (00001) ... | 0 | 2016-07-31T22:43:21Z | 38,689,033 | <p>I think you need the <code>itertools.product</code> here:</p>
<pre><code>import itertools
[''.join(p) for p in itertools.product(*data)]
#['AAAA0',
# 'AAAA2',
# 'AAAB0',
# 'AAAB2',
# 'AAAD0',
# 'AAAD2',
# 'AABA0',
# 'AABA2',
# 'AABB0',
# 'AABB2',
# 'AABD0',
# 'AABD2',
# 'ABAA0',
# 'ABAA2',
# 'ABAB0',
# 'ABAB2',
# ... | 1 | 2016-07-31T22:51:30Z | [
"python",
"arrays",
"combinations"
] |
handling exit status popen python | 38,689,014 | <p>I am tring to handle status exit with popen but it gives a error, the code is:</p>
<pre><code>import os
try:
res = os.popen("ping -c 4 www.google.com")
except IOError:
print "ISPerror: popen"
try:
#wait = [0,0]
wait = os.wait()
except IOError:
print "ISPerror:os.wait"
if wait[1] != 0:
print... | 0 | 2016-07-31T22:48:52Z | 38,689,192 | <h1>Error Explanation</h1>
<p>It looks like this error is occurring because upon exiting, the program tries to destroy <code>res</code>, which involves calling the <code>res.close()</code> method. But somehow invoking <code>os.wait()</code> has already closed the object. So it's trying to close <code>res</code> twice... | 0 | 2016-07-31T23:18:48Z | [
"python"
] |
Keep track of items in array with delimiter python | 38,689,028 | <p>I take in a user supplied input string array that can look like the following:</p>
<pre><code>x=[100.0,150.0,200.0:300.0:10.0,300.0,350.0:400.0:10.0,500.0,600.0:700.0:10.0,800.0,900.0]
</code></pre>
<p>As these are user supplied lists, the ordering of the interval slices [e.g., 200.0:300.0:10.0] can vary, as can t... | 2 | 2016-07-31T22:51:03Z | 38,689,231 | <p>Are you trying to convert this input string/list in to a list/array of numbers, taking into account that some items look like slices?</p>
<p>Here's my experiment with your string (minus the <code>[]</code>). I'll leave a lot of the trial and error in. It might be instructive.</p>
<pre><code>In [957]: txt='100.0,... | 1 | 2016-07-31T23:25:42Z | [
"python",
"arrays",
"numpy"
] |
Keep track of items in array with delimiter python | 38,689,028 | <p>I take in a user supplied input string array that can look like the following:</p>
<pre><code>x=[100.0,150.0,200.0:300.0:10.0,300.0,350.0:400.0:10.0,500.0,600.0:700.0:10.0,800.0,900.0]
</code></pre>
<p>As these are user supplied lists, the ordering of the interval slices [e.g., 200.0:300.0:10.0] can vary, as can t... | 2 | 2016-07-31T22:51:03Z | 38,689,385 | <p>You said the input array is a string, so (using your example):</p>
<pre><code>x = '[100.0,150.0,200.0:300.0:10.0,300.0,350.0:400.0:10.0,500.0,600.0:700.0:10.0,800.0,900.0]'
</code></pre>
<p>Then we split <code>x</code> by <code>,</code> and then the elements by <code>:</code>:</p>
<pre><code>x = x[1:-1].split(','... | 1 | 2016-07-31T23:55:48Z | [
"python",
"arrays",
"numpy"
] |
Attribute error response object doesnot have an attribute 'text' | 38,689,047 | <p>I am trying to use python scrapy tool for extracting the information from the bitcointalk.org website about the users and the public keys that they post in the forum for donation.</p>
<p>I found this piece of code online, made changes to it so that it runs on my desired website, but I am running into an error Attri... | 0 | 2016-07-31T22:53:45Z | 38,689,544 | <p>Something is likely wrong with one of your requests, since it seems like the response from at least one url your crawling is not properly formatted. Either the request itself failed, or you're not making requests appropriately.</p>
<p><a href="https://github.com/scrapy/scrapy/blob/master/scrapy/selector/unified.py#... | 0 | 2016-08-01T00:26:25Z | [
"python",
"scrapy",
"attributeerror"
] |
when creating script have :TypeError: '_io.TextIOWrapper' object is not subscriptable | 38,689,106 | <p>I am trying to make my code narrow down words in a listing an input then sorting them into a different list but it threw out this can anyone help me?</p>
<pre><code>Traceback (most recent call last):
File "C:/Users/dan/Desktop/python/threeword.py", line 4, in <module>
word = words[x],words[(x+1)],words[(x+2)]... | -1 | 2016-07-31T23:06:01Z | 38,689,243 | <p>You problem is that you can't just flat out say <code>words[0]</code> when all you assigned <code>words</code> to is <code>open(filename)</code> the open function in python does not return a list(as you seem to think) instead is returns a <code>file</code> object as said in the python docs about what the <code>open(... | 0 | 2016-07-31T23:27:24Z | [
"python"
] |
how to get rid of pandas converting large numbers in excel sheet to exponential? | 38,689,125 | <p>In the excel sheet , i have two columns with large numbers.</p>
<p>But when i read the excel file with read_excel() and display the dataframe,</p>
<p>those two columns are printed in scientific format with exponential.</p>
<p>How can get rid of this format?</p>
<p>Thanks </p>
<p>Output in Pandas</p>
<p><a hre... | 1 | 2016-07-31T23:08:26Z | 38,691,325 | <p>The way scientific notation is applied is controled via pandas' options:</p>
<pre><code>import pandas as pd
pd.set_option('display.precision',3)
pd.DataFrame({'x':[.001]})
x
0 0.001
</code></pre>
<p>but</p>
<pre><code>pd.DataFrame({'x':[.0001]})
x
0 1.000e-04
</code></pre>
<p>but</p... | 0 | 2016-08-01T05:03:19Z | [
"python",
"pandas",
"machine-learning",
"data-analysis"
] |
get UTF-8 encoded hex value for international character | 38,689,160 | <p>Using Mac OSX and if there is a file encoded with UTF-8 (contains international characters besides ASCII), wondering if any tools or simple command (e.g. in Python 2.7 or shell) we can use to find the related hex (base-16) values (in terms of byte stream)? For example, if I write some Asian characters into the file,... | 0 | 2016-07-31T23:14:40Z | 38,689,190 | <p>You can use the command <code>iconv</code> to convert between encodings. The basic command is:</p>
<pre><code>iconv -f from_encoding -t to_encoding inputfile
</code></pre>
<p>and you can see a list of supported encodings with</p>
<pre><code>iconv --list
</code></pre>
<p>In your case,</p>
<pre><code>iconv -f UT... | 0 | 2016-07-31T23:18:24Z | [
"python",
"python-2.7",
"shell",
"unicode",
"utf-8"
] |
get UTF-8 encoded hex value for international character | 38,689,160 | <p>Using Mac OSX and if there is a file encoded with UTF-8 (contains international characters besides ASCII), wondering if any tools or simple command (e.g. in Python 2.7 or shell) we can use to find the related hex (base-16) values (in terms of byte stream)? For example, if I write some Asian characters into the file,... | 0 | 2016-07-31T23:14:40Z | 38,705,587 | <p><code>od</code> is the right command, but you need to specify an optional argument <code>-t x1</code>:</p>
<pre><code>$ od -t x1 ~/Downloads/12
0000000 31
0000001
</code></pre>
<p>If you prefer not to see the file offsets, try adding <code>-A none</code>:</p>
<pre><code>$ od -A none -t x1 ~/Downloads/12
31
</cod... | 1 | 2016-08-01T18:22:13Z | [
"python",
"python-2.7",
"shell",
"unicode",
"utf-8"
] |
get UTF-8 encoded hex value for international character | 38,689,160 | <p>Using Mac OSX and if there is a file encoded with UTF-8 (contains international characters besides ASCII), wondering if any tools or simple command (e.g. in Python 2.7 or shell) we can use to find the related hex (base-16) values (in terms of byte stream)? For example, if I write some Asian characters into the file,... | 0 | 2016-07-31T23:14:40Z | 38,705,658 | <p>I'm not sure exactly what you want, but this script can help you look up the Unicode codepoint and UTF-8 byte sequence for any character. Be sure to save the source as UTF-8.</p>
<pre><code># coding: utf8
s = u'ææ¯ç¾å½äººã'
for c in s:
print c,'U+{:04X} {}'.format(ord(c),repr(c.encode('utf8')))
</code><... | 2 | 2016-08-01T18:27:21Z | [
"python",
"python-2.7",
"shell",
"unicode",
"utf-8"
] |
How can update my code for a django app without earasing the existing database (Read Description)? | 38,689,171 | <p>I have a python django application that I published to heroku by connecting to github. I want some people to be able to add some information to the database from the website. If I make changes to the code, push to github and deploy the branch the database will go back to how it was at first. How can update my code f... | 0 | 2016-07-31T23:16:13Z | 38,689,489 | <p>If you host your database on a separate server, like with <a href="https://aws.amazon.com/rds/mysql/" rel="nofollow">Amazon RDS</a> or <a href="https://www.heroku.com/postgres" rel="nofollow">Heroku Postgres</a>, and configure your code to connect to this remote host, you should have sufficient decoupling to avoid w... | 1 | 2016-08-01T00:15:10Z | [
"python",
"django",
"database",
"heroku",
"web"
] |
Delay between printing characters in Tkinter | 38,689,182 | <p>I'm trying to make a program that prints to a scrollable textbox. The only problem is that I want a delay between the characters. I've seen it using the print method but when I try to replace it with a textbox and insert it doesnt do anything. Here is the code using the print method.</p>
<pre><code>from time import... | -1 | 2016-07-31T23:17:22Z | 38,689,321 | <p>Tkinter widgets have a method named <code>after</code> which you can use to run a command in the future. You can set up a function that inserts one letter, then calls itself again after a day. </p>
<p>I don't know what you mean by a "scrollable textbox" since tkinter doesn't have a "textbox" widget. There is a sing... | 0 | 2016-07-31T23:41:57Z | [
"python",
"user-interface",
"tkinter",
"textbox"
] |
How do I make a triangle of numbers using python loops? | 38,689,185 | <p>I am trying to achieve this</p>
<pre><code>0 1 2 3 4 5 6 7 8 9
0 1 2 3 4 5 6 7 8
0 1 2 3 4 5 6 7
0 1 2 3 4 5 6
0 1 2 3 4 5
0 1 2 3 4
0 1 2 3
0 1 2
0 1
0
</code></pre>
<p>And I'm getting close but now I'm stuck. Here is my cu... | 2 | 2016-07-31T23:17:57Z | 38,689,263 | <p>interesting puzzle, you could try this:</p>
<pre><code>n = range(0,10) #set your range
while len(n)<20: #loop until it exhausts where you want it too
print ''.join(str(e) for e in n[0:10]) #print as a string!
n = [' ']+n #prepend blank spaces
</code></pre>
<p><a href="http://rextester.com/DTSBRB5... | 1 | 2016-07-31T23:30:13Z | [
"python",
"loops"
] |
How do I make a triangle of numbers using python loops? | 38,689,185 | <p>I am trying to achieve this</p>
<pre><code>0 1 2 3 4 5 6 7 8 9
0 1 2 3 4 5 6 7 8
0 1 2 3 4 5 6 7
0 1 2 3 4 5 6
0 1 2 3 4 5
0 1 2 3 4
0 1 2 3
0 1 2
0 1
0
</code></pre>
<p>And I'm getting close but now I'm stuck. Here is my cu... | 2 | 2016-07-31T23:17:57Z | 38,689,267 | <p>You can try this code:</p>
<pre><code>def triangle():
for i in range(10):
print i * " ",
for j in range(10 - i):
print j,
print
triangle()
</code></pre>
<p>The code is almost self explaining.</p>
<p>Online example is <a href="http://www.codeskulptor.org/#user41_988HYx... | 2 | 2016-07-31T23:30:45Z | [
"python",
"loops"
] |
How do I make a triangle of numbers using python loops? | 38,689,185 | <p>I am trying to achieve this</p>
<pre><code>0 1 2 3 4 5 6 7 8 9
0 1 2 3 4 5 6 7 8
0 1 2 3 4 5 6 7
0 1 2 3 4 5 6
0 1 2 3 4 5
0 1 2 3 4
0 1 2 3
0 1 2
0 1
0
</code></pre>
<p>And I'm getting close but now I'm stuck. Here is my cu... | 2 | 2016-07-31T23:17:57Z | 38,689,887 | <p>The other solutions are fine, but life becomes a little easier with <code>numpy</code>'s <code>arange</code> and the overloaded <code>*</code> operator for strings. Python's built-ins are very powerful.</p>
<pre><code>for i in range(11):
print ' ' * i + ''.join(str(elt) for elt in np.arange(10 - i))
</code></pr... | 0 | 2016-08-01T01:31:53Z | [
"python",
"loops"
] |
Creating a save as function in python | 38,689,271 | <p>I'm trying to create a function to save data taken from multiple Entry widgets in my code and create a new save file storing the data from all the entries.</p>
<p>I made a entry list called entries and try to pull from that but can't get it quite right. It will create the file but its always blank. </p>
<p>This is... | -2 | 2016-07-31T23:31:21Z | 38,690,231 | <pre><code>def file_save_as(self):
fout = asksaveasfilename(defaultextension = '.txt')
try:
with open(fout, 'w') as output:
for x in self.entries:
output.write(x.get())
except FileNotFoundError:
print("Cancelled save or error in filename")
</code></pre>
| 2 | 2016-08-01T02:30:21Z | [
"python",
"file",
"tkinter",
"save"
] |
Trying to install pip error with configparser | 38,689,289 | <p>I am trying to install pip and am getting some issues with configparser. Somehow the import configparser is pointing to the system version of python, python 2.7 instead of python 3.5 </p>
<pre><code>>> pip install -U pip
Traceback (most recent call last):
File "/Users/../anaconda3/bin/pip", line 9, in <... | 0 | 2016-07-31T23:35:37Z | 38,689,344 | <p>I'm assuming you are using Linux OS based on the command.
Give it a try to install with <strong>apt-get</strong>:</p>
<pre><code>apt-get install python-pip
</code></pre>
<p>when not logged in as root use, you must know root password:</p>
<pre><code>sudo apt-get install python-pip
</code></pre>
<p>I used the same... | 0 | 2016-07-31T23:46:39Z | [
"python",
"python-2.7",
"configparser"
] |
Trying to install pip error with configparser | 38,689,289 | <p>I am trying to install pip and am getting some issues with configparser. Somehow the import configparser is pointing to the system version of python, python 2.7 instead of python 3.5 </p>
<pre><code>>> pip install -U pip
Traceback (most recent call last):
File "/Users/../anaconda3/bin/pip", line 9, in <... | 0 | 2016-07-31T23:35:37Z | 38,689,800 | <p>Modify PYTHONPATH to have python 3.x packages path before 2.x packages path</p>
| 0 | 2016-08-01T01:16:46Z | [
"python",
"python-2.7",
"configparser"
] |
How should I be going about exiting python script when user types 'q'? | 38,689,323 | <p>I'm trying to add code to exit my curses python script correctly when the user types <code>q</code>. I can't merely do <code>CTRL+C</code> because then curses won't be de-initialized correctly.</p>
<p>I haven't found a good solution with getting user input that has a timeout so the program doesn't sit there until t... | -2 | 2016-07-31T23:42:11Z | 38,707,781 | <p>The suggested answer <a href="http://stackoverflow.com/questions/24308583/python3-curses-how-to-press-q-for-ending-program-immediately">Python3 + Curses: How to press âqâ for ending program immediately?</a> is a starting point, but (like the suggestion for using a separate thread) is not what is needed.</p>
<p>... | 1 | 2016-08-01T20:42:47Z | [
"python",
"curses",
"python-curses"
] |
Copying Attributes from Superclass Instance while Inheriting? | 38,689,362 | <p>I'm trying to make a subclass that inherits from an instance of its superclass, and bases the majority of its attributes on the superclass attributes. </p>
<pre><code>class Thing:
def __init__(self, a, b, c):
self.a = a
self.b = b
self.c = c
class ThingWithD(Thing):
def __init__(sel... | 0 | 2016-07-31T23:50:33Z | 38,689,449 | <p>With class <code>Thing</code> defined as such:</p>
<pre><code>class Thing:
def __init__(self, a, b, c):
self.a = a
self.b = b
self.c = c
</code></pre>
<p>I can think of 3 ways to do achieve what you are asking using classical inheritence. The first, is to take advantage of your known ar... | 1 | 2016-08-01T00:07:46Z | [
"python",
"inheritance",
"subclass",
"python-3.4",
"superclass"
] |
Copying Attributes from Superclass Instance while Inheriting? | 38,689,362 | <p>I'm trying to make a subclass that inherits from an instance of its superclass, and bases the majority of its attributes on the superclass attributes. </p>
<pre><code>class Thing:
def __init__(self, a, b, c):
self.a = a
self.b = b
self.c = c
class ThingWithD(Thing):
def __init__(sel... | 0 | 2016-07-31T23:50:33Z | 38,689,483 | <p>The most conciseâand object-orientedâway would probably be to just call the superclass's <code>__init__()</code> method and avoid the repetition:</p>
<pre><code>class Thing:
def __init__(self, a, b, c):
self.a = a
self.b = b
self.c = c
class ThingWithD(Thing):
def __init__(self,... | 2 | 2016-08-01T00:14:27Z | [
"python",
"inheritance",
"subclass",
"python-3.4",
"superclass"
] |
Python Error 'list index out of range' When Using Split Function | 38,689,515 | <p>Im am trying to pull info from yahoo finance using urllib2 and then using the split function to display the Net Income. When I go to run the program in the Python 2.7.12 shell I have to print the command "yahooNetIncome('')" with the stock symbol in the single quotes. Whenever I do this it comes up with the error "f... | -2 | 2016-08-01T00:21:04Z | 38,689,551 | <p>Your list index out of range means that your call to the <code>split()</code> method didn't find anything to split on. Therefore, there wouldn't be an index <code>1</code> (no splits, only one index), causing a list index out of range error to be thrown. </p>
| 0 | 2016-08-01T00:28:44Z | [
"python",
"python-2.7"
] |
Python Error 'list index out of range' When Using Split Function | 38,689,515 | <p>Im am trying to pull info from yahoo finance using urllib2 and then using the split function to display the Net Income. When I go to run the program in the Python 2.7.12 shell I have to print the command "yahooNetIncome('')" with the stock symbol in the single quotes. Whenever I do this it comes up with the error "f... | -2 | 2016-08-01T00:21:04Z | 38,689,674 | <p>You're getting bitten by a couple of things.</p>
<p>The out-of-range error you're getting is due to there being nothing in the list that you're trying to get the zeroth element of in your <code>NI</code> assignment line. That list is empty because the <code>split()</code> call is failing, and it's failing because t... | 1 | 2016-08-01T00:54:09Z | [
"python",
"python-2.7"
] |
Multiprocessing using map | 38,689,526 | <p>I have a list of strings and on every string I am doing some changes that you can see in <code>wordify()</code>. Now, to speed this up, I split up the list into sublists using <code>chunked()</code> (the number of sublists is the number of CPU cores - 1). That way I get lists that look like <code>[[,,],[,,],[,,],[,,... | 0 | 2016-08-01T00:22:35Z | 38,689,558 | <p>You have write your code so that you're just passing a single function to <code>map</code>; it's not smart enough to know that your hoping it passes <code>wordlist</code> into the second argument of your function. </p>
<p>TBH partial function application is a bit clunky in Python, but you can use <code>functools.pa... | 1 | 2016-08-01T00:29:39Z | [
"python",
"dictionary",
"multiprocess"
] |
How to get dictionary values from list of lists (any language)? | 38,689,547 | <p>I most interested in simplicity, so would appreciate solution in any language (also interesting how it would look using LINQ). I tried to do it in Python, but failed.</p>
<p>From these two lists:</p>
<pre><code>init_li1 = [[234,45,1,86,2,0],[324,6,1],[123,1111,3]]
init_li2 = ["Alpha", "Beta", "Gamma"]
</code></pre... | -1 | 2016-08-01T00:27:28Z | 38,689,555 | <p>Actually, it's very easy in Python:</p>
<pre><code>dictionary = dict(zip(init_li2, init_li1))
</code></pre>
<p>You see, the <code>dict</code> constructor can be used like this:</p>
<pre><code>dict(('key1', 'value1'), ('key2', 'value2'))
</code></pre>
<p>Well, <code>zip()</code> will generate tuples by taking cor... | 1 | 2016-08-01T00:29:05Z | [
"c#",
"python",
"list",
"dictionary"
] |
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