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 |
|---|---|---|---|---|---|---|---|---|---|
Reading in file block by block using specified delimiter in python | 38,655,176 | <p>I have an input_file.fa file like this (<a href="https://en.wikipedia.org/wiki/FASTA_format" rel="nofollow">FASTA</a> format):</p>
<pre><code>> header1 description
data data
data
>header2 description
more data
data
data
</code></pre>
<p>I want to read in the file one chunk at a time, so that each chunk conta... | 1 | 2016-07-29T09:25:00Z | 38,656,892 | <p>A general solution here will be write a generator function for this that yields one group at a time. This was you will be storing only one group at a time in memory.</p>
<pre><code>def get_groups(seq, group_by):
data = []
for line in seq:
# Here the `startswith()` logic can be replaced with other
... | 1 | 2016-07-29T10:46:50Z | [
"python",
"file",
"python-3.x"
] |
Reading in file block by block using specified delimiter in python | 38,655,176 | <p>I have an input_file.fa file like this (<a href="https://en.wikipedia.org/wiki/FASTA_format" rel="nofollow">FASTA</a> format):</p>
<pre><code>> header1 description
data data
data
>header2 description
more data
data
data
</code></pre>
<p>I want to read in the file one chunk at a time, so that each chunk conta... | 1 | 2016-07-29T09:25:00Z | 38,657,002 | <pre><code>def read_blocks(file):
block = ''
for line in file:
if line.startswith('>') and len(block)>0:
yield block
block = ''
block += line
yield block
with open('input_file.fa') as f:
for block in read_blocks(f):
print(block)
</code></pre>
<p>T... | 0 | 2016-07-29T10:52:46Z | [
"python",
"file",
"python-3.x"
] |
Reading in file block by block using specified delimiter in python | 38,655,176 | <p>I have an input_file.fa file like this (<a href="https://en.wikipedia.org/wiki/FASTA_format" rel="nofollow">FASTA</a> format):</p>
<pre><code>> header1 description
data data
data
>header2 description
more data
data
data
</code></pre>
<p>I want to read in the file one chunk at a time, so that each chunk conta... | 1 | 2016-07-29T09:25:00Z | 38,663,342 | <p>One approach that I like is to use <a href="https://docs.python.org/3.5/library/itertools.html#itertools.groupby" rel="nofollow"><code>itertools.groupby</code></a> together with a simple <code>key</code> fuction:</p>
<pre><code>from itertools import groupby
def make_grouper():
counter = 0
def key(line):
... | 1 | 2016-07-29T16:18:02Z | [
"python",
"file",
"python-3.x"
] |
Adding widgets to form produced by model | 38,655,241 | <p>Hey i am working on calendarium and it is layed out differently to what i normally work with so i'm having a little bit if trouble adding widgets to the form.</p>
<p>There is nothing in the EventCreatView so i dont understnad why there is a form on the page fully im guessing its the args that are passed.which is th... | 0 | 2016-07-29T09:28:07Z | 38,658,547 | <p>There are at least two issues here.</p>
<p>Firstly, <code>widgets</code> is an attribute on a form, not on a view. Like all editing views, UpdateView automatically creates a ModelForm for you based on the model if you don't specify one; but since you want to customise it, you need to define your ModelForm explicitl... | 0 | 2016-07-29T12:12:31Z | [
"python",
"django"
] |
AttributeError: 'list' object has no attribute 'items' in a scrapy | 38,655,329 | <p>I was doing a scrapy with python3.5 then this happened:</p>
<pre><code>Traceback (most recent call last):
File "F:/PyCharm/xiaozhou/main.py", line 6, in <module>
cmdline.execute("scrapy crawl nvospider".split())
File "F:\Python3.5\lib\site-packages\scrapy\cmdline.py", line 108, in execute
settings =... | 1 | 2016-07-29T09:32:17Z | 38,656,785 | <p>According to the docs <code>ITEM_PIPELINES</code> setting <a href="http://doc.scrapy.org/en/latest/topics/settings.html#item-pipelines" rel="nofollow">should be dict</a>, and you got list instead <code>ITEM_PIPELINES = ['xiaozhou.pipelines.XiaozhouPipeline']</code></p>
| 2 | 2016-07-29T10:40:54Z | [
"python",
"mongodb",
"scrapy"
] |
Convert regex string from Java to Python | 38,655,341 | <p>I have the following function in Java to replace occurrences of a regex with a blank space:</p>
<pre><code>string.replaceAll("\r?\n[\\s&&[^\r\n]]*", " ")
</code></pre>
<p>In Python, the equivalent would be:</p>
<pre><code>re.sub("\r?\n[\\s&&[^\r\n]]*", " ", string)
</code></pre>
<p>But I just rea... | 3 | 2016-07-29T09:33:14Z | 38,655,421 | <p>In python, it would be</p>
<pre><code>re.sub(r'\r?\n(?:(?![\r\n])\s)*', " ", stri)
</code></pre>
<p>You may use the same regex in java also.</p>
| 1 | 2016-07-29T09:36:39Z | [
"java",
"python",
"regex",
"python-2.7",
"python-3.x"
] |
Routing from Django to Angular route | 38,655,403 | <p>I have a Django backend and an Angular frontend.
I am using a package called django-invitations. When a user receives an invitation in an email they click on it and are taken to the app. django-invitations requires this line in settings.py</p>
<pre><code>INVITATIONS_SIGNUP_REDIRECT = 'register'
</code></pre>
<p>Th... | 0 | 2016-07-29T09:35:45Z | 38,656,293 | <p>Got it!</p>
<p>Changed the line in urls.py to</p>
<pre><code>url(r'^register/', views.redirect_to_register, name='register'),
</code></pre>
<p>Added a views.py </p>
<pre><code>from django.shortcuts import render
from django.shortcuts import redirect
def redirect_to_register(request):
return redirect('/#/reg... | 0 | 2016-07-29T10:16:06Z | [
"python",
"angularjs",
"django",
"routes",
"angular-ui-router"
] |
Sum alternate columns of a dataframe | 38,655,464 | <p>I have a dataframe which looks like</p>
<pre><code> A 00:00 00:30 01:00 01:30 02:00 .....22:30 23:00 23:30
1 2 3 3 4 3 1 6 4
2 5 6 2 6 5 2 1 2
</code></pre>
<p>I am trying to get, </p>
<pre><code> A 00:00 01:00 02:00 ..... 23:00
1 ... | 2 | 2016-07-29T09:38:47Z | 38,655,559 | <p>I think this should work:</p>
<pre><code>In [261]:
df = pd.DataFrame(np.random.randn(5,6), columns=['00:00','00:30','01:00','01:30','02:00','02:30'])
df
Out[261]:
00:00 00:30 01:00 01:30 02:00 02:30
0 0.176952 1.161850 0.894800 -0.246474 1.252235 -0.816835
1 0.817057 -1.338584 -0.983... | 2 | 2016-07-29T09:43:41Z | [
"python",
"numpy",
"pandas"
] |
Add a dynamically generated matplotlib picture in Django home | 38,655,635 | <p>I would like to add a dynamically generated picture in my home. I do not want to save the figure, but just show it directly in my home page, after some text.
My <code>views.py</code> looks like:</p>
<pre><code>from django.shortcuts import render
def index(request):
import random
import datetime
import d... | 0 | 2016-07-29T09:47:13Z | 38,657,308 | <p>In my experience, <a href="http://frontend.co.il/articles/avoid-data-uris-english" rel="nofollow">using data URIs is usually a bad idea</a>.</p>
<p>In this case, there is no real need for them anyway. Just create a separate view that returns the image. I am using <code>gnuplot</code> here for simplicity. The comman... | 1 | 2016-07-29T11:08:07Z | [
"python",
"django",
"matplotlib"
] |
how to add columns label on a Pandas DataFrame | 38,655,701 | <p>I can't understand how can I add column names on a pandas dataframe, an easy example will clarify my issue:</p>
<pre><code>dic = {'a': [4, 1, 3, 1], 'b': [4, 2, 1, 4], 'c': [5, 7, 9, 1]}
df = pd.DataFrame(dic)
</code></pre>
<p>now if I type df than I get</p>
<pre><code> a b c
0 4 4 5
1 1 2 7
2 3 1 9
... | 0 | 2016-07-29T09:49:44Z | 38,655,847 | <p>The method <code>DataFrame.sum()</code> does an aggregation and therefore returns a <code>Series</code>, not a <code>DataFrame</code>. And a Series has no columns, only an index. If you want to create a DataFrame out of your sum you can change <code>a = df.sum()</code> by:</p>
<pre><code>a = pandas.DataFrame(df.sum... | 1 | 2016-07-29T09:56:09Z | [
"python",
"pandas"
] |
Optimal method to find the max of sublist items within list | 38,655,727 | <p>I have a multidimensional list in the format:</p>
<pre><code>list = [[1, 2, 3], [2, 4, 2], [0, 1, 1]]
</code></pre>
<p>How do I obtain the maximum value of the third value of all the sublists. In pseudo code:</p>
<pre><code>max(list[0][2], list[1][2], list[2][2])
</code></pre>
<p>I know this can be done via iter... | 3 | 2016-07-29T09:51:08Z | 38,655,758 | <p>Use <code>zip</code> function to get the list of columns then use a simple indexing in order to get the expected column:</p>
<pre><code>>>> lst = [[1, 2, 3], [2, 4, 2], [0, 1, 1]]
>>>
>>> max(zip(*lst)[-1]) # in python 3.x max(list(zip(*lst))[-1])
3
</code></pre>
<p>One another alternat... | 3 | 2016-07-29T09:52:44Z | [
"python",
"arrays",
"list",
"list-comprehension"
] |
Optimal method to find the max of sublist items within list | 38,655,727 | <p>I have a multidimensional list in the format:</p>
<pre><code>list = [[1, 2, 3], [2, 4, 2], [0, 1, 1]]
</code></pre>
<p>How do I obtain the maximum value of the third value of all the sublists. In pseudo code:</p>
<pre><code>max(list[0][2], list[1][2], list[2][2])
</code></pre>
<p>I know this can be done via iter... | 3 | 2016-07-29T09:51:08Z | 38,655,781 | <p>Just use <code>max</code> with a generator expression:</p>
<pre><code>>>> lst = [[1, 2, 3], [2, 4, 2], [0, 1, 1]]
>>> max(l[2] for l in lst)
3
</code></pre>
<p>Also, don't name your variables <code>list</code>, you are shadowing the type.</p>
| 3 | 2016-07-29T09:53:37Z | [
"python",
"arrays",
"list",
"list-comprehension"
] |
Optimal method to find the max of sublist items within list | 38,655,727 | <p>I have a multidimensional list in the format:</p>
<pre><code>list = [[1, 2, 3], [2, 4, 2], [0, 1, 1]]
</code></pre>
<p>How do I obtain the maximum value of the third value of all the sublists. In pseudo code:</p>
<pre><code>max(list[0][2], list[1][2], list[2][2])
</code></pre>
<p>I know this can be done via iter... | 3 | 2016-07-29T09:51:08Z | 38,655,794 | <p>applying <code>max</code> on the list will return the maximum list, which isn't what you want. You could indeed use a list comprehension to extract the third element, and then apply <code>max</code> on that comprehension:</p>
<pre><code>>>> lst = [[1, 2, 3], [2, 4, 2], [0, 1, 1]]
>>> max([x[2] for... | 1 | 2016-07-29T09:54:10Z | [
"python",
"arrays",
"list",
"list-comprehension"
] |
Optimal method to find the max of sublist items within list | 38,655,727 | <p>I have a multidimensional list in the format:</p>
<pre><code>list = [[1, 2, 3], [2, 4, 2], [0, 1, 1]]
</code></pre>
<p>How do I obtain the maximum value of the third value of all the sublists. In pseudo code:</p>
<pre><code>max(list[0][2], list[1][2], list[2][2])
</code></pre>
<p>I know this can be done via iter... | 3 | 2016-07-29T09:51:08Z | 38,655,959 | <p>This is exactly why <a href="https://docs.python.org/3/library/functions.html#max" rel="nofollow"><code>max</code></a> has a <code>key</code> argument, it allows to use a custom function to select the "maximum" element:</p>
<pre><code>>>> L = [[1, 2, 3], [2, 4, 2], [0, 1, 1]]
>>> L2 = max(L, key=l... | 3 | 2016-07-29T10:01:31Z | [
"python",
"arrays",
"list",
"list-comprehension"
] |
How to access class attributes of a derived class in the base class in Python3? | 38,655,738 | <p>I want to do something in a base class (<code>FooBase</code>) with the <strong>class attribues</strong> of the derived classes (<code>Foo</code>). I want to do this with Python<strong>3</strong>.</p>
<pre><code>class BaseFoo:
#felder = [] doesn't work
def test():
print(__class__.felder)
class Foo(Base... | 0 | 2016-07-29T09:51:35Z | 38,656,262 | <p>You need to make <code>test</code> a <a href="https://docs.python.org/3/library/functions.html#classmethod" rel="nofollow">class method</a>, and give it an argument that it can use to access the class; conventionally this arg is named <code>cls</code>.</p>
<pre><code>class BaseFoo:
@classmethod
def test(cls... | 1 | 2016-07-29T10:15:01Z | [
"python",
"python-3.x",
"class-attributes"
] |
Python: add to a dictionary in a list | 38,655,798 | <p>I have the following dictionary (It is for creating json), </p>
<pre><code>temp = {'logs':[]}
</code></pre>
<p>I want to append dictionaries, but i only got 1 key:val at a time.</p>
<p>what I tried:</p>
<pre><code>temp['logs'].append({key:val})
</code></pre>
<p>This does as expected and appends the dict to the ... | 1 | 2016-07-29T09:54:19Z | 38,655,866 | <blockquote>
<p>But now I want to add a key/val pair to this dictionary</p>
</blockquote>
<p>You can <em>index</em> the list and <em>update</em> that dictionary:</p>
<pre><code>temp['logs'][0].update({'new_key': 'new_value'})
</code></pre>
| 1 | 2016-07-29T09:56:45Z | [
"python",
"json",
"list",
"dictionary"
] |
Python: add to a dictionary in a list | 38,655,798 | <p>I have the following dictionary (It is for creating json), </p>
<pre><code>temp = {'logs':[]}
</code></pre>
<p>I want to append dictionaries, but i only got 1 key:val at a time.</p>
<p>what I tried:</p>
<pre><code>temp['logs'].append({key:val})
</code></pre>
<p>This does as expected and appends the dict to the ... | 1 | 2016-07-29T09:54:19Z | 38,655,975 | <p>You can use this command to change your dict values :</p>
<pre><code>>>> temp['logs'][0]={'no':'val'}
>>> temp
{'logs': [{'no': 'val'}]}
</code></pre>
<p>And this one to add values : </p>
<pre><code>>>> temp['logs'][0].update({'yes':'val'})
>>> temp
{'logs': [{'key': 'val', 'ye... | 0 | 2016-07-29T10:02:06Z | [
"python",
"json",
"list",
"dictionary"
] |
Python: add to a dictionary in a list | 38,655,798 | <p>I have the following dictionary (It is for creating json), </p>
<pre><code>temp = {'logs':[]}
</code></pre>
<p>I want to append dictionaries, but i only got 1 key:val at a time.</p>
<p>what I tried:</p>
<pre><code>temp['logs'].append({key:val})
</code></pre>
<p>This does as expected and appends the dict to the ... | 1 | 2016-07-29T09:54:19Z | 38,656,040 | <p>There must be unique "key" every time you append it. (If it is for json)</p>
<p>Also making "=" will update your old dictionary</p>
<p>What I have done when I was stuck once is </p>
<pre><code>user = {}
name,password,id1 = [],[],[]
user1=session.query(User).all()
for i in user1:
name=i.name
password=i.pas... | 0 | 2016-07-29T10:05:12Z | [
"python",
"json",
"list",
"dictionary"
] |
Python: add to a dictionary in a list | 38,655,798 | <p>I have the following dictionary (It is for creating json), </p>
<pre><code>temp = {'logs':[]}
</code></pre>
<p>I want to append dictionaries, but i only got 1 key:val at a time.</p>
<p>what I tried:</p>
<pre><code>temp['logs'].append({key:val})
</code></pre>
<p>This does as expected and appends the dict to the ... | 1 | 2016-07-29T09:54:19Z | 38,656,062 | <p>Note that adding a dictionary (or any object) to a list only stores a reference, not a copy.</p>
<p>You can therefor do this:</p>
<pre><code>>>> temp = {'logs': []}
>>> log_entry = {'key1': 'val1'}
>>> temp['logs'].append(log_entry)
>>> temp
{'logs': [{'key1': 'val1'}]}
>>... | 0 | 2016-07-29T10:06:16Z | [
"python",
"json",
"list",
"dictionary"
] |
How to find a node from a file-like xml object in Python3? | 38,655,843 | <p>These is the content of a file-like object <code>toc</code>:</p>
<pre><code><?xml version='1.0' encoding='utf-8'?>
<ncx xmlns="http://www.daisy.org/z3986/2005/ncx/" version="2005-1" xml:lang="eng">
<head>
...
</head>
<docTitle>
<text>THE_TEXT_I_WANT</te... | 0 | 2016-07-29T09:55:59Z | 38,656,086 | <p>Because there is a (default) namespace in your XML, searching for elements called <code>docTitle</code> will find nothing, as it is searching for un-namespaced elements called <code>docTitle</code>. Instead, you need to use clark notation with the full namespace URI:</p>
<pre><code>toc_tree.find('{http://www.daisy.... | 0 | 2016-07-29T10:07:12Z | [
"python",
"xml",
"elementtree"
] |
How is __mro__ different from other double underscore names? | 38,655,863 | <p>I stumbled upon this behavior for double underscore name that I don't understand:</p>
<pre><code>class A:
pass
class B:
pass
class C(A,B):
__id__ = 'c'
c = C()
print(C.__mro__) # print the method resolution order of class C
#print(c.__mro__) # AttributeError: 'C' object has no attribute '__mro__'
pr... | 4 | 2016-07-29T09:56:36Z | 38,656,156 |
<p>This has to do with the lookup order.</p>
<p>Letting <a href="https://docs.python.org/3/reference/datamodel.html#implementing-descriptors" rel="nofollow">descriptors</a> aside, python first checks the objects <code>__dict__</code> to find an attribute. If it cannot find it, it will look at the class of the object... | 4 | 2016-07-29T10:10:42Z | [
"python",
"python-3.4",
"double-underscore"
] |
Search part of string matching in python | 38,655,972 | <p>I have two files one is "error_dict" file and other is "jbosslogfile" error dict file contains known error messages in each line like
error_dict</p>
<pre><code>"0500 ERROR [org.picketlink.identity.federation]"
"-0500 ERROR [com.gravitant.cloud.appsportfolio.jsf.architecture.beans.StorageAccountBean]"
"Invalid Cont... | 0 | 2016-07-29T10:02:02Z | 38,727,204 | <p>Here is code which loop through my error repo files and in final error log file if there is match with line it will yank(delete) that line from log file and before performing this operation it will create backup file.</p>
<pre><code>#This function will be matching error lines from error repo files and if matched it... | 0 | 2016-08-02T17:45:49Z | [
"python",
"regex",
"python-2.7"
] |
Reading text file with numpy.loadtxt | 38,655,983 | <p>I am getting an error when trying to read a text file. </p>
<pre><code>import numpy as np
fnam = 'file.txt'
test_fnames = np.loadtxt(fnam, dtype=None, delimiter=',')
test_fnames
</code></pre>
<p>I now get this error:</p>
<pre><code>ValueError: could not convert string to float:
</code></pre>
<p>The file conten... | 0 | 2016-07-29T10:02:45Z | 38,658,893 | <p>You could use <code>np.genfromtxt()</code> instead of <code>np.loadtxt</code>.
Because the first one let handles missing values :</p>
<pre><code>import numpy as np
fnam = 'file.txt'
test_fnames = np.genfromtxt(fnam, dtype=None, delimiter=',')
</code></pre>
<p>You could also try :</p>
<pre><code>import numpy as n... | 0 | 2016-07-29T12:30:34Z | [
"python",
"numpy",
"file-io"
] |
lxml eTree iterparse depth | 38,656,008 | <p>I am trying to parse some xml which is in the following format:</p>
<pre><code><label>
<name></name>
<sometag></sometag>
<sublabels>
<label></label>
<label></label>
</sublabel>
</label>
</... | 4 | 2016-07-29T10:03:48Z | 38,717,524 | <p>The first thing that came to mind</p>
<pre><code>path = []
for event, element in etree.iterparse(gzip.GzipFile(f), events=('start', 'end')):
if event == 'start':
path.append(element.tag)
elif event == 'end':
if element.tag == 'label':
if not 'sublabels' in path:
n... | 0 | 2016-08-02T10:08:27Z | [
"python",
"lxml"
] |
lxml eTree iterparse depth | 38,656,008 | <p>I am trying to parse some xml which is in the following format:</p>
<pre><code><label>
<name></name>
<sometag></sometag>
<sublabels>
<label></label>
<label></label>
</sublabel>
</label>
</... | 4 | 2016-07-29T10:03:48Z | 38,740,507 | <p>This works for me and is inspired by the previous answer:</p>
<pre><code>name = None
level = 0
for event, element in etree.iterparse(gzip.GzipFile(f), events=('end', 'start' ), tag='label'):
# Update current level
if event == 'start': level += 1;
elif event == 'end': level -= 1;
# Get name for top l... | 2 | 2016-08-03T10:06:13Z | [
"python",
"lxml"
] |
Access JSON data in Python | 38,656,081 | <pre><code>header = {'Content-type': 'application/json','Authorization': 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx' }
url = 'https://sandbox-authservice.priaid.ch/login'
response = requests.post(url, headers = header, verify=False).json()
token = json.dumps(response)
print token['ValidThrough']
</code></pre>
<p>I want to prin... | 0 | 2016-07-29T10:07:02Z | 38,656,191 | <p>Since the response already seems to be in json, there is no need to use <code>json.dumps</code>.</p>
<p><code>json.dumps</code> on a dictionary will return a string which cannot be indexed obviously and hence that error.</p>
| 2 | 2016-07-29T10:11:57Z | [
"python",
"json",
"hook.io"
] |
Access JSON data in Python | 38,656,081 | <pre><code>header = {'Content-type': 'application/json','Authorization': 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx' }
url = 'https://sandbox-authservice.priaid.ch/login'
response = requests.post(url, headers = header, verify=False).json()
token = json.dumps(response)
print token['ValidThrough']
</code></pre>
<p>I want to prin... | 0 | 2016-07-29T10:07:02Z | 38,656,606 | <p>a requests response <code>.json()</code> method already loads the content of the string to json.</p>
<p>You should use that, but your code later serializes it back to a string, and hence the error (<code>token</code> is a string representation of the dict you are expecting, not the dict). You should just omit the <... | 0 | 2016-07-29T10:32:01Z | [
"python",
"json",
"hook.io"
] |
Tweepy script affecting MongoDB service shutting down | 38,656,126 | <p>I have the following Python script that uses <a href="http://docs.tweepy.org" rel="nofollow">Tweepy</a> to get tweets and store them into MongoDB using <a href="https://api.mongodb.com/python/current/" rel="nofollow">PyMongo</a>. What's happening is whenever I run this script, my MongoDB instance gets shut down, and... | 0 | 2016-07-29T10:09:21Z | 39,656,533 | <p>Not exactly sure yet why, but the following answer to a question about permission problems on the MongoDB lock helped solve this problem: <a href="http://stackoverflow.com/a/15982017/863923">http://stackoverflow.com/a/15982017/863923</a></p>
| 0 | 2016-09-23T08:48:29Z | [
"python",
"mongodb",
"pymongo",
"tweepy"
] |
Using a dynamic array python multi-threads | 38,656,201 | <p>In python, I have a thread to add elements to an array. And I have another thread that uses the first element of that array then deletes it.
The problem is that the second thread is faster than the first one, so I need that it waits for the first one to add other elements and then process instead of going into an er... | 0 | 2016-07-29T10:12:28Z | 38,656,365 | <p>You should be using the <a href="https://docs.python.org/2/library/queue.html" rel="nofollow">Synchronised Queue</a> class or similar.</p>
<p>The Queue class handles overlength and underlength with blocking and optional timeouts. It's also threadsafe.</p>
<pre><code>import threading
import Queue
import time
import... | 3 | 2016-07-29T10:19:24Z | [
"python"
] |
Visible deprecation warning using boolean operation on numpy array | 38,656,284 | <p>I'm having an issue where I keep receiving a warning stating:</p>
<pre><code>VisibleDeprecationWarning: boolean index did not match indexed array along dimension 0;
dimension is 744 but corresponding boolean dimension is 1
</code></pre>
<p>When I try to use this:</p>
<pre><code>x_low = xcontacts[(xcontacts[5:6]... | 2 | 2016-07-29T10:15:44Z | 38,656,991 | <p>Thanks to @Syrtis Major for this:</p>
<pre><code>x_low = xcontacts[(xcontacts[:,5] <= 2000)]
x_med = xcontacts[(xcontacts[:,5] <= 4000)]
x_med = xcontacts[(xcontacts[:,5] > 2000)]
x_hi = xcontacts[(xcontacts[:,5] > 4000)]
</code></pre>
| 0 | 2016-07-29T10:51:57Z | [
"python",
"arrays",
"numpy",
"boolean-operations"
] |
get_pdf api.v8 Odoo. What parameter should I send as "records" | 38,656,347 | <p>In the source code of record.py I found</p>
<pre><code>@api.v8
def get_pdf(self, records, report_name, html=None, data=None):
return Report.get_pdf(self._model, self._cr, self._uid, records.ids,
report_name, html=html, data=data, context=self._context)
</code></pre>
<p>I inher... | 0 | 2016-07-29T10:18:28Z | 38,660,614 | <p>Records are database entries in object form. For example <code>account.invoice</code>: when you press the print button on an invoice, it will be the record for the report. In your example, <code>self</code> will be the record of the model <code>cust_report</code> model you pressed the button on.</p>
<p>Every Odoo r... | 1 | 2016-07-29T13:51:53Z | [
"python",
"openerp"
] |
Python looping through multiple lists | 38,656,370 | <p>I've this code:</p>
<pre><code>for i in range(0, len(codiceCassExcel)):
count1step += 1
for j in range(0, len(vwLinesToList)):
if data_reg[i] == vwLinesToList[j][1]:
if codiceCassExcel[i] == vwLinesToList[j][0]:
#Gestione movimento diverso da 601 e non bolle nostre
if tipo_mov[i... | 0 | 2016-07-29T10:19:35Z | 38,656,461 | <p>Use <a href="https://docs.python.org/2/library/functions.html#zip" rel="nofollow"><strong>zip</strong></a> method to iterate over your lists. See <a href="http://stackoverflow.com/questions/13704860/zip-lists-in-python">zip lists in python</a> for code samples.</p>
<p>Also consider using of <a href="https://docs.py... | 1 | 2016-07-29T10:24:20Z | [
"python",
"list",
"for-loop",
"nested-lists"
] |
Python:Selecting a range of lines from one file and copying it to another file | 38,656,396 | <p>I have a file and i want to select certain lines in the file and copy it to another file.</p>
<p>In the first file the line where i want to copy has the word "XYZ" and from here i want to select the next 200 lines(including the match line) and copy it to another file.</p>
<p>The below is my code</p>
<pre><code>ma... | 1 | 2016-07-29T10:21:07Z | 38,656,610 | <p>You can use <code>itertools.islice</code> on the file object once the match is found:</p>
<pre><code>from itertools import islice
# some code before matching line is found
chunk = line + ''.join(islice(f1, 200))
</code></pre>
<p>This will consume the iterator <code>f1</code> to the next 200 lines, and so the <cod... | 1 | 2016-07-29T10:32:09Z | [
"python",
"python-2.7",
"file"
] |
Python:Selecting a range of lines from one file and copying it to another file | 38,656,396 | <p>I have a file and i want to select certain lines in the file and copy it to another file.</p>
<p>In the first file the line where i want to copy has the word "XYZ" and from here i want to select the next 200 lines(including the match line) and copy it to another file.</p>
<p>The below is my code</p>
<pre><code>ma... | 1 | 2016-07-29T10:21:07Z | 38,657,797 | <p>How about something like</p>
<pre><code>>>> with open("pokemonhunt", "r") as f:
... Lines = []
... numlines = 5
... count = -1
... for line in f:
... if "pokemon" in line: % gotta catch 'em all!!!
... count = 0
... if -1 < count < numlines:
... Lines.append(line)... | 0 | 2016-07-29T11:33:46Z | [
"python",
"python-2.7",
"file"
] |
Conditionally override python module on import: Design issues | 38,656,563 | <p>in my setup/design, requesting a module of a subpackage automatically loads all other modules from that package. I seek a way to circumvent this.</p>
<h2>Disclaimer</h2>
<p><em>A few months ago, I asked a question which is related. However, since this issue is new and different, I created this as a new question.</... | 0 | 2016-07-29T10:30:15Z | 38,656,772 | <p>Just make local configuration <em>explicit</em>.</p>
<p>Have people that want to override configuration create a <code>local_config.py</code> file. You can add that to <code>.gitignore</code>. Have users import <strong>that</strong> module in their own code.</p>
<p>At the top of the <code>local_config.py</code> mo... | 1 | 2016-07-29T10:40:34Z | [
"python",
"python-2.7",
"import",
"module"
] |
input dimensions to a one dimensional convolutional network in keras | 38,656,566 | <p>really finding it hard to understand the input dimensions to the convolutional 1d <a href="http://keras.io/layers/convolutional/#convolution1d" rel="nofollow">layer</a> in keras:</p>
<p>Input shape</p>
<p>3D tensor with shape: (samples, steps, input_dim).</p>
<p>Output shape</p>
<p>3D tensor with shape: (samples... | 1 | 2016-07-29T10:30:23Z | 38,673,493 | <p>The reason why it look like this is that Keras designer intended to make 1-dimensional convolutional framework to be interpreted as a framework to deal with sequences. To fully understand the difference - try to imagine that you have a sequence of a multiple feature vectors. Then your output will be at least two dim... | 2 | 2016-07-30T11:34:47Z | [
"python",
"neural-network",
"theano",
"conv-neural-network",
"keras"
] |
'Gui' object has no attribute 'after' | 38,656,585 | <p>I took my working tkinter code (which only drew window/buttons and so on) and tried to add some code from the approved answer here: <a href="http://stackoverflow.com/questions/16938647/python-code-for-serial-data-to-print-on-window">python code for serial data to print on window.</a></p>
<p>The approved answer work... | 0 | 2016-07-29T10:31:17Z | 38,656,720 | <p>The the method <code>after</code> was a inherited from <code>Tkinter.Tk</code>. <a href="http://stackoverflow.com/questions/16938647/python-code-for-serial-data-to-print-on-window">Check mentioned question</a></p>
<p>You probably should subclass Tkinter.Tk</p>
<pre><code>...
import Tkinter
class Gui(Tkinter.Tk)
... | 1 | 2016-07-29T10:37:48Z | [
"python",
"multithreading",
"tkinter",
"pyserial"
] |
'Gui' object has no attribute 'after' | 38,656,585 | <p>I took my working tkinter code (which only drew window/buttons and so on) and tried to add some code from the approved answer here: <a href="http://stackoverflow.com/questions/16938647/python-code-for-serial-data-to-print-on-window">python code for serial data to print on window.</a></p>
<p>The approved answer work... | 0 | 2016-07-29T10:31:17Z | 38,656,773 | <p>The culprit is in this line in the process_serial function:</p>
<pre><code>self.after(100, self.process_serial)
</code></pre>
<p>The self variable that is in here refers to the Gui object, not to a tkinter object that has the 'after' function.</p>
<p>There is a mismatch between your code and the code from the lin... | 4 | 2016-07-29T10:40:35Z | [
"python",
"multithreading",
"tkinter",
"pyserial"
] |
How to compute percentiles from frequency table? | 38,656,609 | <p>I have CSV file:</p>
<pre><code>fr id
1 10000152
1 10000212
1 10000847
1 10001018
2 10001052
2 10001246
14 10001908
...........
</code></pre>
<p>This is a frequency table, where <code>id</code> is integer variable and <code>fr</code> is number of occurrences given value. File is sorted ascending by value.
I ... | 0 | 2016-07-29T10:32:09Z | 38,657,471 | <p>Seems like you want cumulative sum of <code>fr</code>. You can do</p>
<pre><code>cumfr = [sum(fr(:i+1)) for i in range(len(fr))]
</code></pre>
<p>Then the percentiles are</p>
<pre><code>percentile = [100*i/cumfr[-1] for i in cumfr]
</code></pre>
| 0 | 2016-07-29T11:16:51Z | [
"python",
"numpy",
"pandas",
"statistics"
] |
Building MultiIndex in Pandas DataFrame | 38,656,625 | <p>I am reading in two files into Python, both with the form:</p>
<pre><code> 0.00902317 0.0270695 0.0451159 0.0631622 \
0000010 6.962980e-05 7.063750e-05 7.165970e-05 7.269680e-05
1000010 0.000000e+00 0.000000e+00 0.000000e+00 0.000000e+00
2000010 0.000000e+00 0.000000e+00 0... | 2 | 2016-07-29T10:33:02Z | 38,657,256 | <p>I think you can use <a href="http://pandas.pydata.org/pandas-docs/stable/generated/pandas.concat.html" rel="nofollow"><code>concat</code></a>:</p>
<pre><code>print (pd.concat([df1, df2], axis=1, keys=['File 1','File 2']))
File 1 File 2
0.00902317 0.0... | 2 | 2016-07-29T11:05:07Z | [
"python",
"pandas",
"indexing",
"dataframe",
"multi-index"
] |
Alias in list comprehension and iterators | 38,656,729 | <p>Suppose I have something like:</p>
<pre><code>for e in some_list:
fct(e.my_first_property, e. e.my_second_property)
fct2(e.my_first_property)
</code></pre>
<p>That's a bit repetitive to write, so I could use</p>
<pre><code>for e in some_list:
p1 = e.my_first_property
p2 = e.my_second_property
... | 0 | 2016-07-29T10:38:05Z | 38,656,774 | <p>You can use <a href="https://docs.python.org/2/library/operator.html#operator.attrgetter" rel="nofollow"><code>operator.attrgetter</code></a> with <code>map</code>:</p>
<pre><code>from operator import attrgetter
for p1, p2 in map(attrgetter(my_first_property, my_second_property), some_list):
fct(p1, p2)
fc... | 2 | 2016-07-29T10:40:38Z | [
"python"
] |
Formatting calculated fields in Django to have spaces as decimal thousand separator | 38,656,910 | <p>I've come across a strange behaviour of Django formatting. Best described by an example:</p>
<p>Model:</p>
<pre><code>class MyModel(models.Model):
value= models.DecimalField(max_digits=8, decimal_places=2)
</code></pre>
<p>my_template.html:</p>
<pre><code>{% load humanize %}
{{calculated_sum|floatformat|intco... | 1 | 2016-07-29T10:47:45Z | 38,661,017 | <p>did you try changing <code>return order_sum</code> to <code>return int(order_sum)</code> or doing the logic to add a space in your get_latest_orders_sum func. ie </p>
<pre><code>return str(order_sum).replace("," " ")
</code></pre>
| 0 | 2016-07-29T14:12:57Z | [
"python",
"django"
] |
In Pandas, when selecting with "where", delete columns where condition is not met rather than filling with NaN | 38,656,930 | <p>In Numpy, using <code>where</code> will give you a subset of the original array. For example,</p>
<pre><code>import numpy as np
np.where(np.arange(5)>2)[0]
</code></pre>
<p>will return <code>array([3, 4])</code>. I'd like to do something similar with Pandas. However, if I define a similar DataFrame like so:</p>... | 2 | 2016-07-29T10:48:25Z | 38,657,145 | <p>IIUC you can call <code>dropna</code> passing <code>axis=1</code> to drop columns containing any <code>NaN</code> values:</p>
<pre><code>In [272]:
df[df > 2].dropna(axis=1)
Out[272]:
3 4
0 3 4
</code></pre>
| 3 | 2016-07-29T10:59:26Z | [
"python",
"pandas"
] |
In Pandas, when selecting with "where", delete columns where condition is not met rather than filling with NaN | 38,656,930 | <p>In Numpy, using <code>where</code> will give you a subset of the original array. For example,</p>
<pre><code>import numpy as np
np.where(np.arange(5)>2)[0]
</code></pre>
<p>will return <code>array([3, 4])</code>. I'd like to do something similar with Pandas. However, if I define a similar DataFrame like so:</p>... | 2 | 2016-07-29T10:48:25Z | 38,657,605 | <p>You can drop the columns where the column names are smaller than 3, <em>provided the column names are integers</em>, if the column values are higher than 2.</p>
<pre><code>print(df.drop(df[df.columns[df.columns < 3]] > 2, 1))
</code></pre>
<p>output:</p>
<pre><code> 3 4
0 3 4
</code></pre>
| 0 | 2016-07-29T11:23:43Z | [
"python",
"pandas"
] |
Write non-Unicode using csv module | 38,656,958 | <p>While migrating to Python 3, I noticed some files we generate using the built-in <code>csv</code> now have <code>b'</code> prefix around each strings...</p>
<p>Here's the code, that should generate a .csv for a list of <code>dogs</code>, according to some parameters defined by <code>export_fields</code> (thus alway... | 0 | 2016-07-29T10:50:01Z | 38,657,058 | <p>The <code>csv</code> module deals with <em>text</em>, and converts anything that is not a string to a string using <code>str()</code>. </p>
<p>Don't pass in <code>bytes</code> objects. Pass in <code>str</code> objects or types that cleanly convert to strings with <code>str()</code>. That means you <em>should not en... | 1 | 2016-07-29T10:55:29Z | [
"python",
"python-3.x",
"csv",
"encoding",
"stringio"
] |
Python: create a dictionary from data in excel | 38,656,975 | <p>I have data </p>
<pre><code> sign number result
Qjobstatus 1 РабоÑÐ°Ñ Ð¿Ð¾Ð»Ð½Ñй ÑабоÑий денÑ
Qjobstatus 2 РабоÑÐ°Ñ Ð½ÐµÐ¿Ð¾Ð»Ð½Ñй ÑабоÑий денÑ
Qjobstatus 3 Ðе ÑабоÑаÑ
Qcountry 1 РоÑÑиÑ
Qcountry 2 УкÑаина
Qcountry 3 ÐелаÑ... | 1 | 2016-07-29T10:50:49Z | 38,657,231 | <p>IIUC then you can just call <code>dict</code> on the np array:</p>
<pre><code>In [284]:
dict(df.loc[df['sign']=='Qcountry','number':].values)
Out[284]:
{1: 'РоÑÑиÑ',
2: 'УкÑаина',
3: 'ÐелаÑÑÑÑ',
4: 'ÐзеÑбайджан',
5: 'ÐÑмениÑ',
6: 'ÐÑÑзиÑ',
7: 'ÐазаÑ
ÑÑан',... | 2 | 2016-07-29T11:03:49Z | [
"python",
"pandas",
"dictionary"
] |
Python: create a dictionary from data in excel | 38,656,975 | <p>I have data </p>
<pre><code> sign number result
Qjobstatus 1 РабоÑÐ°Ñ Ð¿Ð¾Ð»Ð½Ñй ÑабоÑий денÑ
Qjobstatus 2 РабоÑÐ°Ñ Ð½ÐµÐ¿Ð¾Ð»Ð½Ñй ÑабоÑий денÑ
Qjobstatus 3 Ðе ÑабоÑаÑ
Qcountry 1 РоÑÑиÑ
Qcountry 2 УкÑаина
Qcountry 3 ÐелаÑ... | 1 | 2016-07-29T10:50:49Z | 38,657,281 | <p>A bit of a roundabout method but try:</p>
<pre><code>df = df[df['sign'] == 'Qcountry']
transposed = df.T.to_dict()
result = {transposed[item]['number']: transposed[item]['result']
for item in transposed}
</code></pre>
| 1 | 2016-07-29T11:06:26Z | [
"python",
"pandas",
"dictionary"
] |
Python: create a dictionary from data in excel | 38,656,975 | <p>I have data </p>
<pre><code> sign number result
Qjobstatus 1 РабоÑÐ°Ñ Ð¿Ð¾Ð»Ð½Ñй ÑабоÑий денÑ
Qjobstatus 2 РабоÑÐ°Ñ Ð½ÐµÐ¿Ð¾Ð»Ð½Ñй ÑабоÑий денÑ
Qjobstatus 3 Ðе ÑабоÑаÑ
Qcountry 1 РоÑÑиÑ
Qcountry 2 УкÑаина
Qcountry 3 ÐелаÑ... | 1 | 2016-07-29T10:50:49Z | 38,657,494 | <p>Solution with <a href="http://pandas.pydata.org/pandas-docs/stable/generated/pandas.Series.to_dict.html" rel="nofollow"><code>to_dict</code></a>:</p>
<pre><code>print (df[df['sign']=='Qcountry'].set_index('number')['result'].to_dict())
{1: 'РоÑÑиÑ',
2: 'УкÑаина',
3: 'ÐелаÑÑÑÑ',
4: 'Ðзе... | 1 | 2016-07-29T11:17:59Z | [
"python",
"pandas",
"dictionary"
] |
How to call a Python script with arguments from Java class | 38,657,109 | <p>I am using <em>Python 3.4</em>.</p>
<p>I have a Python script <code>myscript.py</code> :</p>
<pre><code>import sys
def returnvalue(str) :
if str == "hi" :
return "yes"
else :
return "no"
print("calling python function with parameters:")
print(sys.argv[1])
str = sys.argv[1]
res = returnvalue... | 1 | 2016-07-29T10:57:57Z | 38,657,448 | <p>Have you looked at these? They suggest different ways of doing this:</p>
<p><a href="http://stackoverflow.com/questions/27235286/call-python-code-from-java-by-passing-parameters-and-results">Call Python code from Java by passing parameters and results</a></p>
<p><a href="http://stackoverflow.com/questions/9381906/... | 0 | 2016-07-29T11:15:46Z | [
"java",
"python",
"python-3.4"
] |
scikits learn SVM - 1-dimensional Separating Hyperplane | 38,657,138 | <p>How to plot the separating "hyperplane" for 1-dimensional data using scikit svm ?</p>
<p>I follow this guide for 2-dimensional data : <a href="http://scikit-learn.org/stable/auto_examples/svm/plot_svm_margin.html" rel="nofollow">http://scikit-learn.org/stable/auto_examples/svm/plot_svm_margin.html</a>, but don't kn... | 0 | 2016-07-29T10:59:07Z | 38,661,632 | <p>the <code>.coef_</code> member of <code>clf</code> will return the "hyperplane," which, in one dimension, is just a point. Check out <a href="http://stackoverflow.com/questions/23186804/graph-point-on-straight-line-number-line-in-python">this post</a> for info on how to plot points on a numberline.</p>
| 0 | 2016-07-29T14:44:28Z | [
"python",
"numpy",
"matplotlib",
"scikit-learn",
"svm"
] |
scikits learn SVM - 1-dimensional Separating Hyperplane | 38,657,138 | <p>How to plot the separating "hyperplane" for 1-dimensional data using scikit svm ?</p>
<p>I follow this guide for 2-dimensional data : <a href="http://scikit-learn.org/stable/auto_examples/svm/plot_svm_margin.html" rel="nofollow">http://scikit-learn.org/stable/auto_examples/svm/plot_svm_margin.html</a>, but don't kn... | 0 | 2016-07-29T10:59:07Z | 38,666,962 | <p>The separating hyperplane for two-dimensional data is a line, whereas for one-dimensional data the hyperplane boils down to a point. The easiest way to plot the separating hyperplane for one-dimensional data is a bit of a hack: the <strong>data are made two-dimensional</strong> by adding a second feature which takes... | 0 | 2016-07-29T20:26:09Z | [
"python",
"numpy",
"matplotlib",
"scikit-learn",
"svm"
] |
Openstack IP address Filter | 38,657,243 | <p>The command : <code>neutron.list_ports()["ports"]</code> (Python) gives me all the IP addresses that I have on my machine.</p>
<p>For example:</p>
<pre><code>[{u'status': u'ACTIVE',
u'name': u'',
u'allowed_address_pairs': [],
u'admin_state_up': True,
u'network_id': u'7da####81c2##79e2',
u'dns_name': u'',
u'e... | 0 | 2016-07-29T11:04:27Z | 38,657,877 | <p>list -> num -> dict</p>
<pre><code>a = [{'name': 'one'}, {'name': 'two'}]
a[0]['name']
</code></pre>
<p>access to elements</p>
<pre><code>network = neutron.list_ports()["ports"]
for elem in network:
print a['status']
print a['network_id']
print a['ip_address']
print a['dns_assignment'][0]['ip_addr... | 0 | 2016-07-29T11:38:02Z | [
"python",
"django",
"ip-address",
"openstack",
"keystone"
] |
Skimage: how to combine RGB channels? | 38,657,282 | <p>I have three grey channels of one image, each channel is a 2-dim array with values from 0 to 255. I need to combine this three images to one RGB and get something like this: [[234, 45, 67], ...], ... [[34, 7, 162], ...]! I use skimage, numpy to solve this problem. I can't find in documentation appropriate function(<... | 0 | 2016-07-29T11:06:28Z | 38,657,655 | <p>Use numpy's dstack (<a href="http://docs.scipy.org/doc/numpy/reference/generated/numpy.dstack.html" rel="nofollow">http://docs.scipy.org/doc/numpy/reference/generated/numpy.dstack.html</a>)</p>
<pre><code>import numpy as np
r = np.random.rand(10)
g = np.random.rand(10)
b = np.random.rand(10)
zipped = np.dstack((r,... | 1 | 2016-07-29T11:26:10Z | [
"python",
"skimage"
] |
Return value from python script via CGI | 38,657,311 | <p>I work on a raspberry Pi. I did a small html page with 2 buttons calling executables via CGI and doing things. I would like to add a temperature display on the same page.</p>
<p>I have a small python script that reads the temperature of a sensor and I can successfully display it on console or via direct CGI (typing... | 0 | 2016-07-29T11:08:26Z | 38,657,536 | <p>You can write out a complete html page with CGI</p>
<p>A simple CGI script would be</p>
<pre><code>temp=100
print("Content-Type: text/html") # HTML is following
print() # blank line, end of headers
print("<!doctype html>")
print("<html><head><title>Example<... | 0 | 2016-07-29T11:19:56Z | [
"python",
"cgi",
"raspberry-pi2"
] |
How can I get the type of a class without instantiating it in Python? | 38,657,337 | <p>Given an object it is easy to get the object type in python:</p>
<pre><code>obj = SomeClass()
t = type(obj)
</code></pre>
<p>How can I do this without first creating an instance of the class?</p>
<p>Background: Once you have the type you easily can create instances of that type. Using this mechanism I want to pas... | 0 | 2016-07-29T11:09:16Z | 38,657,719 | <p>See this example code:</p>
<pre><code>class MyClass(object):
pass
if __name__ == '__main__':
o1 = MyClass()
c = MyClass
o2 = c()
print(type(o1), type(o2), MyClass)
</code></pre>
<p>Defining a class binds it to its name (here: <code>MyClass</code>), which is nothing else but a reference to tha... | 1 | 2016-07-29T11:28:58Z | [
"python",
"python-3.x",
"oop"
] |
Pandas: groupby by date and transform nunique returning too many entries | 38,657,341 | <p>I am trying to do a simple group-by in Pandas and it is not working as it should:</p>
<pre><code>url='https://raw.githubusercontent.com/108michael/ms_thesis/master/raw_bills'
bills=pd.read_csv(url)
bills.date.nunique()
11
bills.dtypes
date float64
bills object
id.thomas int64
dtype: object
... | 0 | 2016-07-29T11:09:29Z | 38,657,514 | <p>I'm not sure what you're asking, but don't you want to use:</p>
<pre><code>bills[['date', 'bills']].groupby('date').bills.nunique()
date
2005.0 6820
2006.0 3738
2007.0 7454
2008.0 3627
2009.0 7324
2010.0 3297
2011.0 5787
2012.0 4647
2013.0 5694
2014.0 3211
2015.0 5
Name: bills, ... | 1 | 2016-07-29T11:18:45Z | [
"python",
"pandas",
"group-by"
] |
C# returning tuple - like Python | 38,657,476 | <p>I'm new to OOP and C#. I have a strong Python background and I was wondering is there an equivalent in C# for this</p>
<pre><code>#Python
def outputSmth():
num1 = 3
num2 = 3
str1 = "Hi"
return (num1, num2, str1) #Returning a tuple that can later be accessed
# by ind... | 0 | 2016-07-29T11:17:15Z | 38,657,527 | <p>You could simply return a <code>string[]</code> or <code>List<string></code>:</p>
<pre><code>static string[] PrintUserCreationMnu()
{
// ...
return new[]{ usrID, f_Name, l_Name, l_Date};
}
</code></pre>
<p>But in general it would be better to create a custom type <code>User</code> with meaningful ... | 1 | 2016-07-29T11:19:15Z | [
"c#",
"python",
"return",
"tuples"
] |
C# returning tuple - like Python | 38,657,476 | <p>I'm new to OOP and C#. I have a strong Python background and I was wondering is there an equivalent in C# for this</p>
<pre><code>#Python
def outputSmth():
num1 = 3
num2 = 3
str1 = "Hi"
return (num1, num2, str1) #Returning a tuple that can later be accessed
# by ind... | 0 | 2016-07-29T11:17:15Z | 38,657,543 | <p>Tuples are coming in C# 7 (current is 6.0). So, unfortunately not yet. </p>
<p>I cant wait for them, especially when dealing with methods that return more that one parameter (without having to set up structures to deal with them). </p>
<p>For now you need to return something like a <code>List</code>, <code>Diction... | 0 | 2016-07-29T11:20:21Z | [
"c#",
"python",
"return",
"tuples"
] |
python ravel vs. transpose when used in reshape | 38,657,496 | <p>I have a 2D array <code>v</code>, <code>v.shape=(M_1,M_2)</code>, which I want to reshape into a 3D array with <code>v.shape=(M_2,N_1,N_2)</code>, and <code>M_1=N_1*N_2</code>. </p>
<p>I came up with the following lines which produce the same result:</p>
<pre><code>np.reshape(v.T, reshape_tuple)
</code></pre>
<p>... | 3 | 2016-07-29T11:18:04Z | 38,663,695 | <p>The order in which they do things - reshape, change strides, and make a copy - differs, but they end up doing the same thing.</p>
<p>I like to use <code>__array_interface__</code> to see where the data buffer is located, and other changes. I suppose I should add the <code>flags</code> to see the <code>order</code>... | 1 | 2016-07-29T16:40:57Z | [
"python",
"numpy",
"reshape"
] |
Detect whether to fetch from psycopg2 cursor or not? | 38,657,566 | <p>Let's say if I execute the following command.</p>
<pre><code>insert into hello (username) values ('me')
</code></pre>
<p>and I ran like</p>
<pre><code>cursor.fetchall()
</code></pre>
<p>I get the following error</p>
<pre><code>psycopg2.ProgrammingError: no results to fetch
</code></pre>
<p>How can I detect whe... | 0 | 2016-07-29T11:21:59Z | 38,657,798 | <p>So what you <em>appear</em> to be asking is:</p>
<p>Is there any way, given a PostgreSQL cursor, to fetch the data from that cursor if there is any?</p>
<p>My own personal preference would simply be to attempt to run the <code>fetchall()</code> and then catch the inevitable exception.</p>
<pre><code>try:
data... | 1 | 2016-07-29T11:33:51Z | [
"python",
"psycopg2"
] |
Add headers from csv to dictionary keys and the columns below them as a list of values | 38,657,578 | <p>I have the following csv file:</p>
<pre><code>h1 h2 h3 h4
10 11 12 13
14 15 16 17
18 19 20 21
</code></pre>
<p>And the output that I'd like to obtain is a dictionary:</p>
<pre><code>dict = {'h1': ['10','14','18'], 'h2': ['11','15','19'],
'h3': ['12','16','20'], 'h4': ['13','17','21']}
</code>... | 0 | 2016-07-29T11:22:28Z | 38,657,775 | <p>You just have to add the <code>delimiter='\t'</code> argument and you'll get what you want:</p>
<pre><code>import csv
from collections import defaultdict
def get_columns_from_source_file():
source_file_reader = csv.DictReader(open('test.csv'), delimiter='\t')
columns_storage = defaultdict(list)
for so... | 3 | 2016-07-29T11:32:26Z | [
"python",
"python-3.x",
"csv"
] |
Generating models for Flask-AppBuilder using flask-sqlqcodegen | 38,657,634 | <p>I'm a beginner in Python and Flask ecosystems, trying to create a small proof-of-concept Web application for a research project. I'm using Debian Linux 7.9, PostgreSQL 9.5, SQLAlchemy (latest) and Flask-AppBuilder (latest). Since creating models manually is tedious and error-prone, I searched the mighty Internet and... | 1 | 2016-07-29T11:25:16Z | 38,680,067 | <p>Upon some Internet searching, I ran across an issue on GitHub, which described exactly the same problem. However, the most recent recommendation at the time produced another error instead of the original one. In the <a href="https://github.com/ksindi/flask-sqlacodegen/issues/8" rel="nofollow">discussion</a> with the... | 1 | 2016-07-31T01:53:47Z | [
"python",
"postgresql",
"flask",
"flask-sqlalchemy"
] |
Adding pandas dataframe iteratively in a memory efficient way | 38,657,712 | <p>I am trying to iteratively add some pandas dataframe that I read from a set of csv files, and after the 16th file or so I get a memory error. The new files are pandas of around 300k rows.</p>
<p>Is there a way to do this in the hard drive (for example with hdf5) or in a more memory efficient way?</p>
<p>See code b... | 2 | 2016-07-29T11:28:46Z | 38,657,807 | <p>You can use <a href="http://pandas.pydata.org/pandas-docs/stable/generated/pandas.concat.html" rel="nofollow"><code>concat</code></a> with <a href="http://pandas.pydata.org/pandas-docs/stable/generated/pandas.DataFrame.sum.html" rel="nofollow"><code>sum</code></a>:</p>
<pre><code>files = glob.glob('files/*.csv')
d... | 1 | 2016-07-29T11:34:18Z | [
"python",
"pandas",
"memory-management",
"dataframe"
] |
Adding pandas dataframe iteratively in a memory efficient way | 38,657,712 | <p>I am trying to iteratively add some pandas dataframe that I read from a set of csv files, and after the 16th file or so I get a memory error. The new files are pandas of around 300k rows.</p>
<p>Is there a way to do this in the hard drive (for example with hdf5) or in a more memory efficient way?</p>
<p>See code b... | 2 | 2016-07-29T11:28:46Z | 38,657,939 | <p><strong>UPDATE:</strong> i would simply add reading all CSVs in chunks to your solution. I think you are already doing it very well in terms of memory saving...</p>
<pre><code>sum_of_all_files = pd.DataFrame()
for file_name in list_of_files:
for file_df in pd.read_csv(file_name, index_col=0, header=None, chunks... | 1 | 2016-07-29T11:41:52Z | [
"python",
"pandas",
"memory-management",
"dataframe"
] |
Docker Apache Proxy point to running Python Script | 38,657,735 | <p>Hoping that someone can help me understand what I have done wrong in my setup. I have a Ubuntu Server set up with Docker. I have an Apache container(running on port 80) set up to run as a Proxy and use Virtual Hosts to point to a port dependent on domain name.</p>
<pre><code><VirtualHost *:80>
ServerName m... | 1 | 2016-07-29T11:30:13Z | 38,657,805 | <p>I assume this is running on localhost? so you want to collect on the domain but route to localhost?</p>
<p>I also assume that the python script is running on port 8080? And that apache is running on port 80?</p>
<p>Try this </p>
<pre><code><VirtualHost *:80>
ServerName myDomain.com
ServerAlias www.myD... | 0 | 2016-07-29T11:34:16Z | [
"python",
"apache",
"docker",
"proxy",
"virtualhost"
] |
Docker Apache Proxy point to running Python Script | 38,657,735 | <p>Hoping that someone can help me understand what I have done wrong in my setup. I have a Ubuntu Server set up with Docker. I have an Apache container(running on port 80) set up to run as a Proxy and use Virtual Hosts to point to a port dependent on domain name.</p>
<pre><code><VirtualHost *:80>
ServerName m... | 1 | 2016-07-29T11:30:13Z | 38,658,319 | <p>OMG! I am sorry to waste your time, stupid me didn't run <code>a2ensite domain.com.conf</code> before I reloaded apache2 service... I apologise... That has fixed the issue!</p>
| 0 | 2016-07-29T12:00:51Z | [
"python",
"apache",
"docker",
"proxy",
"virtualhost"
] |
how to remove duplicate values in a dataset : python | 38,657,741 | <p>I want to remove duplicate items in a dataset by keeping the ones with highest value. Now I am using pandas :</p>
<pre><code>c_maxes = hospProfiling.groupby(['Hospital_ID', 'District_ID'], group_keys=False)\
.apply(lambda x: x.ix[x['Hospital_employees'].idxmax()])
print c_maxes
c_maxes.to_csv('data... | 1 | 2016-07-29T11:30:22Z | 38,658,251 | <p>I think you need:</p>
<pre><code>hospProfiling.loc[hospProfiling.groupby(['Hospital_ID', 'District_ID'])['Hospital_employees']
.idxmax()]
</code></pre>
<p>I was very surprised with another answer and I do some research, if function <a href="http://pandas.pydata.org/pandas-docs/stable... | 1 | 2016-07-29T11:57:13Z | [
"python",
"pandas"
] |
how to remove duplicate values in a dataset : python | 38,657,741 | <p>I want to remove duplicate items in a dataset by keeping the ones with highest value. Now I am using pandas :</p>
<pre><code>c_maxes = hospProfiling.groupby(['Hospital_ID', 'District_ID'], group_keys=False)\
.apply(lambda x: x.ix[x['Hospital_employees'].idxmax()])
print c_maxes
c_maxes.to_csv('data... | 1 | 2016-07-29T11:30:22Z | 38,658,258 | <p>Why not using groupby <code>max</code> method? </p>
<pre><code>hopsProfiling.groupby(['Hospital_ID','District_ID'],as_index = False).max()
</code></pre>
<p>And if you happen to have more than three columns, replace max by agg:</p>
<pre><code>hopsProfiling.groupby(['Hospital_ID','District_ID'],as_index = False).ag... | 3 | 2016-07-29T11:57:25Z | [
"python",
"pandas"
] |
Download docxtpl generated file with cherrypy | 38,657,787 | <p>I am using docxtpl to generate a word document, and wondering how a user can download this file once generated using cherrypy, please see my code below.</p>
<p>the only solution i could come up with is to save it to the www folder and create a link to the location, but i am sure this can be simplified.</p>
<p>code... | 0 | 2016-07-29T11:33:14Z | 38,665,815 | <p>The short answer is that basically you need to write some in-memory stream (e.g. <code>BytesIO</code>), pre-set some HTTP headers and return a <a href="http://docs.cherrypy.org/en/latest/pkg/cherrypy.lib.html?highlight=file_generator#cherrypy.lib.file_generator" rel="nofollow"><code>file_generator</code></a>.
Your q... | 1 | 2016-07-29T18:59:07Z | [
"python",
"cherrypy"
] |
Python Tkinter label refresh | 38,657,868 | <p>I'm trying to build a gui that creates a password and i've got as far as generating the password and making it appear in a label. However when the button is clicked multiple times it appears the old password doesnt dissapear, it just overlays on top. I'm also getting an error that i cant seem to rectify, although it... | 0 | 2016-07-29T11:37:19Z | 38,658,132 | <p>Try this example.</p>
<pre><code>from tkinter import *
import random
myGui = Tk()
myGui.geometry('300x200+700+250')
myGui.title('Password Generator')
def passwordgen():
password = ''
for i in range(8):
##----runs the for loop 8 times
if (i == 0) or (i == 4):
password = passwor... | 2 | 2016-07-29T11:51:26Z | [
"python",
"user-interface",
"tkinter"
] |
Does enumerate over slice perform sublist materialization? | 38,657,870 | <p>Does this:</p>
<pre><code>for i,v in enumerate(lst[from:to]):
</code></pre>
<p>or this:</p>
<pre><code>for i,v in enumerate(itertools.islice(lst,from,to)):
</code></pre>
<p>...make a copy of iterated sublist?</p>
| 2 | 2016-07-29T11:37:23Z | 38,658,522 | <p>Assuming that <code>lst</code> is a regular Python list, and not a Numpy array, Pandas dataframe, or some custom class supporting slice indexing, then the slice <code>[...:...]</code> will create a new list, whereas <a href="https://docs.python.org/3/library/itertools.html#itertools.islice" rel="nofollow"><code>iter... | 2 | 2016-07-29T12:11:13Z | [
"python",
"python-3.x"
] |
Grep and replace fuzzy pattern of string | 38,658,041 | <p>I have a few files with python code and decorators like this:</p>
<pre><code>@trace('api.module.function_name', info=None, custom_args=False)
</code></pre>
<p>The only difference between these decorators is the string 'api.module.function_name' - func name and module are different. And depending on the this param ... | 0 | 2016-07-29T11:47:09Z | 38,658,501 | <p>Something like this should work:</p>
<pre class="lang-none prettyprint-override"><code>(\n|^)\s*@trace\(\s*'[^']*',\s*info=None,\s*custom_args=False\s*\)\s*(\r|\n|$)
</code></pre>
<p>See the <a href="https://regex101.com/r/wU7zK5/2" rel="nofollow">demo</a></p>
| 1 | 2016-07-29T12:10:10Z | [
"python",
"regex"
] |
Grep and replace fuzzy pattern of string | 38,658,041 | <p>I have a few files with python code and decorators like this:</p>
<pre><code>@trace('api.module.function_name', info=None, custom_args=False)
</code></pre>
<p>The only difference between these decorators is the string 'api.module.function_name' - func name and module are different. And depending on the this param ... | 0 | 2016-07-29T11:47:09Z | 38,658,571 | <p>Use <code>^@trace\('api\.(.+)\.(.+)', info=None, custom_args=False\)$</code> with a multiline flag.</p>
<p>You may want to use <a href="https://docs.python.org/3/library/re.html#re.sub" rel="nofollow">re.sub</a> :</p>
<pre><code>>>> import re
>>> pattern = re.compile('^@trace\('api\.(.+)\.(.+)', ... | 1 | 2016-07-29T12:13:56Z | [
"python",
"regex"
] |
How can i find all ydl_opts | 38,658,046 | <pre><code>ydl_opts = {
'verbose': True, #like this
'format': '{}'.format(int(comboget)), #format,vebrose,ottmpl
'outtmpl': '%(title)s-%(id)s.%(ext)s', #how can i find
'noplaylist': mt, #all dictionary
'logger': MyLogger(), #options
'p... | 0 | 2016-07-29T11:47:22Z | 38,659,184 | <p>All options for the Python Module are listed in <a href="https://github.com/rg3/youtube-dl/blob/master/youtube_dl/YoutubeDL.py#L128-L278" rel="nofollow">YoutubeDL.py</a></p>
<p>Here is a small excerpt</p>
<blockquote>
<pre><code>username: Username for authentication purposes.
password: Password f... | 1 | 2016-07-29T12:42:39Z | [
"python",
"python-3.x",
"youtube-dl"
] |
Python Selenium Webdriver - Grab div after specified one | 38,658,052 | <p>I am trying to use Python Selenium Firefox Webdriver to grab the h2 content 'My Data Title' from this HTML</p>
<pre><code><div class="box">
<ul class="navigation">
<li class="live">
<span>
Section Details
</span>
</li>
... | 2 | 2016-07-29T11:47:39Z | 38,658,352 | <p>yeah, you need to do some complicated xpath searching:</p>
<pre><code>referenceElementList = driver.find_elements_by_xpath("//span")
for eachElement in referenceElementList:
if eachElement.get_attribute("innerHTML") == 'Section Details':
elementYouWant = eachElement.find_element_by_xpath("../../../follo... | 1 | 2016-07-29T12:02:19Z | [
"python",
"selenium",
"selenium-webdriver"
] |
Python Selenium Webdriver - Grab div after specified one | 38,658,052 | <p>I am trying to use Python Selenium Firefox Webdriver to grab the h2 content 'My Data Title' from this HTML</p>
<pre><code><div class="box">
<ul class="navigation">
<li class="live">
<span>
Section Details
</span>
</li>
... | 2 | 2016-07-29T11:47:39Z | 38,658,446 | <p>Here is an XPath to select the title following the text "Section Details":</p>
<pre><code>//div[@class='box'][normalize-space(.)='Section Details']/following::h2
</code></pre>
| 2 | 2016-07-29T12:06:53Z | [
"python",
"selenium",
"selenium-webdriver"
] |
Python Selenium Webdriver - Grab div after specified one | 38,658,052 | <p>I am trying to use Python Selenium Firefox Webdriver to grab the h2 content 'My Data Title' from this HTML</p>
<pre><code><div class="box">
<ul class="navigation">
<li class="live">
<span>
Section Details
</span>
</li>
... | 2 | 2016-07-29T11:47:39Z | 38,658,548 | <p>If you want grab the <code>h2</code> in the box class that comes after the one that has the span with text <code>Section Details</code> try below <code>xpath</code> using <code>preceding</code> :-</p>
<pre><code>(//h2[preceding::span[normalize-space(text()) = 'Section Details']])[1]
</code></pre>
<p>or using <code... | 2 | 2016-07-29T12:12:36Z | [
"python",
"selenium",
"selenium-webdriver"
] |
How to remove .com from an url in python? | 38,658,085 | <p>I want to remove the domain in an url
For e.g. User entered www.google.com
But I only need www.google</p>
<p>How to do this in python?
Thanks </p>
| 0 | 2016-07-29T11:48:56Z | 38,658,108 | <p>If you want to remove 4 characters at the end, <a class='doc-link' href="http://stackoverflow.com/documentation/python/289/indexing-and-slicing#t=201607291151112404835">slice it</a></p>
<pre><code>url = 'www.google.com'
cut_url = str[:-4]
# output : 'www.google'
</code></pre>
<hr>
<p><em>More advanced answer</em>... | 0 | 2016-07-29T11:50:10Z | [
"python",
"urlparse"
] |
How to remove .com from an url in python? | 38,658,085 | <p>I want to remove the domain in an url
For e.g. User entered www.google.com
But I only need www.google</p>
<p>How to do this in python?
Thanks </p>
| 0 | 2016-07-29T11:48:56Z | 38,658,143 | <p>This is a very general question. But the narrowest answer would be as follows (assuming <code>url</code> holds the URL in question):</p>
<pre><code>if url.endswith(".com"):
url = url[:-4]
</code></pre>
<p>If you want to remove the last period and everything to the right of it the code would be a little more co... | 3 | 2016-07-29T11:52:01Z | [
"python",
"urlparse"
] |
How to remove .com from an url in python? | 38,658,085 | <p>I want to remove the domain in an url
For e.g. User entered www.google.com
But I only need www.google</p>
<p>How to do this in python?
Thanks </p>
| 0 | 2016-07-29T11:48:56Z | 38,658,372 | <p>To solve this without having the problem of dealing with domain name, you can look for the dots from left hand side and stop at the second dot.</p>
<pre><code>t = 'www.google.com'
a = t.split('.')[1]
pos = t.find(a)
t = t[:pos+len(a)]
>>> 'www.google'
</code></pre>
| 0 | 2016-07-29T12:03:11Z | [
"python",
"urlparse"
] |
How to remove .com from an url in python? | 38,658,085 | <p>I want to remove the domain in an url
For e.g. User entered www.google.com
But I only need www.google</p>
<p>How to do this in python?
Thanks </p>
| 0 | 2016-07-29T11:48:56Z | 38,658,634 | <p>What you need here is <code>rstrip</code> function.</p>
<p>Try this code:</p>
<pre><code>url = 'www.google.com'
url2 = 'www.google'
new_url = url.rstrip('.com')
print (new_url)
new_url2 = url2.rstrip('.com')
print (new_url2)
</code></pre>
<p><code>rstrip</code> will only strip if the string is present, in this ... | -1 | 2016-07-29T12:16:26Z | [
"python",
"urlparse"
] |
how to fix "list indices must be integers, not list" | 38,658,135 | <p>Hi i would like to know what is wrong with this code</p>
<pre><code>f = open('test.txt', 'a+')
yourResult = [line.split(',') for line in f.readlines()]
for answer in yourResult:
print (yourResult[answer])
a = raw_input('What Was That')
Format = (answer + ' : ' + a + ', ')
f.write(Format)
print (Format)
File = ... | 0 | 2016-07-29T11:51:32Z | 38,658,219 | <p>When you use a for this way, <code>answer</code> is one of the elements of yourResult, not the index of such an element.<br>
To do what you want with indexes, do :</p>
<pre><code>for answer in range(len(yourResult)):
print(yourResult[answer])
</code></pre>
<p>In this case, you'll look inside yourResult by usin... | 0 | 2016-07-29T11:55:47Z | [
"python",
"typeerror"
] |
how to fix "list indices must be integers, not list" | 38,658,135 | <p>Hi i would like to know what is wrong with this code</p>
<pre><code>f = open('test.txt', 'a+')
yourResult = [line.split(',') for line in f.readlines()]
for answer in yourResult:
print (yourResult[answer])
a = raw_input('What Was That')
Format = (answer + ' : ' + a + ', ')
f.write(Format)
print (Format)
File = ... | 0 | 2016-07-29T11:51:32Z | 38,658,234 | <p><code>yourResult[answer]</code> can't work, the <code>[]</code> are expecting integer. when you do:</p>
<p><code>for answer in yourResult:</code>, <code>answer</code> is a <strong>list</strong>(thanks bruno desthuilliers).</p>
<p>You should do: </p>
<pre><code>for answer in yourResult:
print (answer)
</code><... | 1 | 2016-07-29T11:56:42Z | [
"python",
"typeerror"
] |
how to fix "list indices must be integers, not list" | 38,658,135 | <p>Hi i would like to know what is wrong with this code</p>
<pre><code>f = open('test.txt', 'a+')
yourResult = [line.split(',') for line in f.readlines()]
for answer in yourResult:
print (yourResult[answer])
a = raw_input('What Was That')
Format = (answer + ' : ' + a + ', ')
f.write(Format)
print (Format)
File = ... | 0 | 2016-07-29T11:51:32Z | 38,658,301 | <p>Python's <code>for</code> loop doesn't yield indices but the item in the sequence itself, so here, inside the loop, <code>answer</code> is already an element of <code>yourResult</code>. IOW, you want:</p>
<pre><code>for answer in yourResult:
print (answer)
</code></pre>
<p>As a side note:</p>
<p>1/ a <code>fi... | 1 | 2016-07-29T11:59:39Z | [
"python",
"typeerror"
] |
how to fix "list indices must be integers, not list" | 38,658,135 | <p>Hi i would like to know what is wrong with this code</p>
<pre><code>f = open('test.txt', 'a+')
yourResult = [line.split(',') for line in f.readlines()]
for answer in yourResult:
print (yourResult[answer])
a = raw_input('What Was That')
Format = (answer + ' : ' + a + ', ')
f.write(Format)
print (Format)
File = ... | 0 | 2016-07-29T11:51:32Z | 38,658,374 | <p>You don't need to use </p>
<pre><code>print(yourResult[answer])
</code></pre>
<p>using</p>
<pre><code>print(answer)
</code></pre>
<p>will do what I expect you want.
Since you have created yourResult as a list, yourResult[x] expects x to be a number from 0 to len(yourResult)-1.
By doing</p>
<pre><code>for answ... | 0 | 2016-07-29T12:03:20Z | [
"python",
"typeerror"
] |
Python Scrapy 301 redirects | 38,658,247 | <p>I have a little problem, printing the redirected urls (new URLs after 301 redirection) when scraping a given website. My idea is to only print them and not scrape them. My current peace of code is:</p>
<pre><code>import scrapy
import os
from scrapy.spiders import CrawlSpider, Rule
from scrapy.linkextractors import ... | 0 | 2016-07-29T11:57:07Z | 38,659,886 | <p>To parse any responses that are not 200 you need to add <code>handle_httpstatus_list</code> parameter to your spider. In your case something like: </p>
<pre><code>class MySpider(scrapy.Spider):
handle_httpstatus_list = [301]
... # rest of the spider
</code></pre>
| 3 | 2016-07-29T13:15:26Z | [
"python",
"scrapy"
] |
Django CMS â Show different content for users and guests in same template | 38,658,253 | <p>I would like to have different content for users and guests in my home page's template using <strong>Django 1.9</strong> and <strong>Django CMS 3.3.1</strong>.</p>
<p>It could be acomplished by making subpages and showing the corresponding content in the ancestor based on authentication conditional, but that makes ... | 0 | 2016-07-29T11:57:16Z | 38,659,327 | <p><strong>Try this:</strong></p>
<pre><code>{% block content %}
{% if request.toolbar.build_mode or request.toolbar.edit_mode %}
{% placeholder "guests" %}
{% placeholder "authenticated" %}
{% else %}
{% if not user.is_authenticated %}
{% placeholder "guests" %}
... | 3 | 2016-07-29T12:48:46Z | [
"python",
"django",
"django-templates",
"django-cms"
] |
Write to file from different functions(python) | 38,658,376 | <p>is it possible to write to a single file from different function python.</p>
<pre><code>from __future__ import print_function
f = open("txt.txt", "wb")
def f1():
...write to txt.txt
def f2():
...write to txt.txt
</code></pre>
<p>is it possible?</p>
| 0 | 2016-07-29T12:03:24Z | 38,658,680 | <p>Just taking the previous suggestions and putting it into code. Thanks all.</p>
<p><strong>functions.py:</strong></p>
<pre><code>def f1(file):
file.write("Function one.")
def f2(file):
file.write("Function two.")
</code></pre>
<p><strong>main.py:</strong></p>
<pre><code>from functions import f1, f2
wit... | 1 | 2016-07-29T12:19:09Z | [
"python"
] |
Create blob from URL in gae using python | 38,658,417 | <p>I'm trying to create a blob from an image URL but I can't figure out how to do that. </p>
<p>I've already read the documentation from google about creating blob, but it talks only about creating blob from a form and using <code>blobstore.create_upload_url('/upload_photo').</code>
I read some question over there but... | 0 | 2016-07-29T12:05:28Z | 38,658,773 | <p>The <a href="https://cloud.google.com/appengine/docs/python/googlecloudstorageclient/functions#open" rel="nofollow"><code>cloudstorage.open()</code></a> clearly exists, so the error likely indicates some library/naming conflict in your environment.</p>
<p>A method for debugging such conflict is described in this po... | 0 | 2016-07-29T12:23:35Z | [
"python",
"python-2.7",
"google-app-engine",
"blobstore",
"google-cloud-datastore"
] |
recursively collect string blocks in python | 38,658,470 | <p>I have a custom data file formatted like this:</p>
<pre><code>{
data = {
friends = {
max = 0 0,
min = 0 0,
},
family = {
cars = {
van = "honda",
car = "ford",
bike = "trek",
},
pre... | 1 | 2016-07-29T12:08:29Z | 38,659,444 | <p>You can create a <code>to_block</code> function that takes the lines from your file as an iterator and recursively creates a nested dictionary from those. (Of course you could also use a custom <code>Block</code> class, but I don't really see the benefit in doing so.)</p>
<pre><code>def to_block(lines):
block =... | 1 | 2016-07-29T12:54:37Z | [
"python"
] |
recursively collect string blocks in python | 38,658,470 | <p>I have a custom data file formatted like this:</p>
<pre><code>{
data = {
friends = {
max = 0 0,
min = 0 0,
},
family = {
cars = {
van = "honda",
car = "ford",
bike = "trek",
},
pre... | 1 | 2016-07-29T12:08:29Z | 38,659,653 | <p>You can also do with ast or json with the help of regex substitutions.</p>
<pre><code>import re
a = """{
data = {
friends = {
max = 0 0,
min = 0 0,
},
family = {
cars = {
van = "honda",
car = "ford",
bik... | 1 | 2016-07-29T13:03:36Z | [
"python"
] |
Indexing many JSON objects into Elasticsearch - the canonical way | 38,658,471 | <p>Here's a scenario I keep facing, and I am in doubt whether the solution I take is the canonical/smart one. Assume you a file where each line is a valid JSON. Furthermore, each object contains a field <code>type</code> and <code>id</code> and the pairs of are unique. My goal is to index all the objects into an index ... | 2 | 2016-07-29T12:08:30Z | 38,658,606 | <p>Definitely the <code>bulk</code> approach. But you need to put a bit more work into this, as it's not as easy as creating one file, sending it to ES and expect it to deal with it.</p>
<p>If the file is too big, of course it will struggle.
Do please read this section of the documentation, especially the last part wh... | 0 | 2016-07-29T12:15:25Z | [
"python",
"json",
"elasticsearch",
"jq"
] |
Calculating circular motion in a tuple array | 38,658,472 | <p>I got a project to deliver for school.
The project is about random movement based systems, me and my mate chose to research a double pendulum set(movement is not random but chaotic).
Our research question wants to investigate if the system can get to a state of periodic motion in any point and in how much time will ... | 0 | 2016-07-29T12:08:33Z | 38,660,237 | <p><strong>EDIT:</strong> OP clarified the question and stated that he is searching for periodical movement, not <code>m1</code> or <code>m2</code> <em>flipping over</em>.</p>
<p>The approach below refers to <em>flip detection</em> for one of the two masses at the double pendulum.</p>
<h2>Flip detection</h2>
<p>Dete... | 2 | 2016-07-29T13:33:04Z | [
"python",
"arrays",
"physics"
] |
Changing iterable variable during loop | 38,658,490 | <p>Let <code>it</code> be an iterable element in python.
In what cases is a change of <code>it</code> inside a loop over <code>it</code> reflected? Or more straightforward: When does something like this work?</p>
<pre><code>it = range(6)
for i in it:
it.remove(i+1)
print i
</code></pre>
<p>Leads to 0,2,4 bein... | 6 | 2016-07-29T12:09:32Z | 38,658,791 | <p>When you iterate over a <code>list</code> you actually call <code>list.__iter__()</code>, which returns a <code>listiterator</code> object bound to the <code>list</code>, and then actually iterate over this <code>listiterator</code>. Technically, this:</p>
<pre><code>itt = [1, 2, 3]
for i in itt:
print i
</code... | 6 | 2016-07-29T12:24:36Z | [
"python",
"for-loop"
] |
Changing iterable variable during loop | 38,658,490 | <p>Let <code>it</code> be an iterable element in python.
In what cases is a change of <code>it</code> inside a loop over <code>it</code> reflected? Or more straightforward: When does something like this work?</p>
<pre><code>it = range(6)
for i in it:
it.remove(i+1)
print i
</code></pre>
<p>Leads to 0,2,4 bein... | 6 | 2016-07-29T12:09:32Z | 38,658,815 | <p>In the first loop you are changing the <code>it</code> object (inner state of the object), however, in the second loop you are reassigning the <code>it</code> to another object, leaving initial object unchanged.</p>
<p>Let's take a look at the generated bytecode:</p>
<pre><code>In [2]: def f1():
...: it = r... | 4 | 2016-07-29T12:25:58Z | [
"python",
"for-loop"
] |
Changing iterable variable during loop | 38,658,490 | <p>Let <code>it</code> be an iterable element in python.
In what cases is a change of <code>it</code> inside a loop over <code>it</code> reflected? Or more straightforward: When does something like this work?</p>
<pre><code>it = range(6)
for i in it:
it.remove(i+1)
print i
</code></pre>
<p>Leads to 0,2,4 bein... | 6 | 2016-07-29T12:09:32Z | 38,658,829 | <p>First, it is essential to understand what happens under the hood when you run a simple for-loop, like:</p>
<pre><code>for i in it: pass
</code></pre>
<p>At the beginning of the loop, an <em>iterator</em> is created. That iterator is the result of an implicit call to <code>iter(it)</code>. This is the <em>only</em... | 4 | 2016-07-29T12:26:33Z | [
"python",
"for-loop"
] |
Calculate with date, without import dateutil | 38,658,521 | <pre><code>from datetime import datetime
from dateutil import relativedelta
date1 = datetime.strptime(str('2011-08-15 12:00:00'), '%Y-%m-%d %H:%M:%S')
date2 = datetime.strptime(str('2012-02-15'), '%Y-%m-%d')
r = relativedelta.relativedelta(date2, date1)
r.months
</code></pre>
<p>The code above does the trick for me bu... | 1 | 2016-07-29T12:11:04Z | 38,658,756 | <p>Seems this post helps: <a href="http://stackoverflow.com/questions/1345827/how-do-i-find-the-time-difference-between-two-datetime-objects-in-python">How do I find the time difference between two datetime objects in python?</a></p>
<p>simply do a substraction on two datetime obj, then you can get what detail you wan... | 1 | 2016-07-29T12:23:08Z | [
"python",
"python-2.7"
] |
Calculate with date, without import dateutil | 38,658,521 | <pre><code>from datetime import datetime
from dateutil import relativedelta
date1 = datetime.strptime(str('2011-08-15 12:00:00'), '%Y-%m-%d %H:%M:%S')
date2 = datetime.strptime(str('2012-02-15'), '%Y-%m-%d')
r = relativedelta.relativedelta(date2, date1)
r.months
</code></pre>
<p>The code above does the trick for me bu... | 1 | 2016-07-29T12:11:04Z | 38,659,029 | <p>Interestingly enough, your code outputs to: <code>5</code> which means, as suggested in the comments, that you are probably interested in the duration of each month and you do not want to round your results. Unfortunately the <code>timedelta</code> object will not work for you in this case because by definition, a t... | 0 | 2016-07-29T12:35:46Z | [
"python",
"python-2.7"
] |
Scrapy iterating over selector yields n duplicated items for number of selectors found on page | 38,658,552 | <p>I have a working scraper that I have built to collect information from a review site. The problem I'm having is that when I crawl a business page with several reviews and try to yield the items, I only get the first item n times (where n is the number of reviews the selector found).</p>
<p>I've read up a lot on gen... | 0 | 2016-07-29T12:12:45Z | 38,659,276 | <p>Once you have your "sub-selector" <code>reviewSelector</code> you need to use <code>.</code> before your xpath to indicate sub-selector level.</p>
<p>i.e. this:</p>
<pre><code>reviewSelector.xpath('//*[@itemprop="author"]/@content').extract_first()
</code></pre>
<p>should be:</p>
<pre><code>reviewSelector.xpath(... | 0 | 2016-07-29T12:46:38Z | [
"python",
"scrapy",
"generator"
] |
add() argument after * must be a sequence, not Settings | 38,658,684 | <p>I'm trying to build a game that moves a ship left and right with the arrow keys and fires bullets when the spacebar is pressed. When I press the spacebar my game crashes and this error is shown:
Traceback (most recent call last):</p>
<pre><code>TypeError: add() argument after * must be a sequence, not Settings
</co... | 2 | 2016-07-29T12:19:23Z | 38,660,821 | <p>You are missing an underscore <code>_</code> in your <code>Bullet.__init__</code> method. You currently have <code>_init__</code> when it should be <code>__init__</code>.</p>
<p>This results in Python calling the <code>Sprite.__init__</code> method with <code>ai_settings</code> as the first argument, since it canno... | 2 | 2016-07-29T14:02:52Z | [
"python",
"pygame",
"sprite",
"add"
] |
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