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 |
|---|---|---|---|---|---|---|---|---|---|
Python selenium webdriver. Find elements with specified class name | 38,698,948 | <p>I am using Selenium to parse a page containing markup that looks a bit like this:</p>
<pre><code><html>
<head><title>Example</title></head>
<body>
<div>
<span class="Fw(500) D(ib) Fz(42px)">1</span>
<span class="Fw(500)... | 0 | 2016-08-01T12:29:55Z | 38,699,056 | <p>Try to find elements by XPath:</p>
<pre><code>//span[@class='foobar']
</code></pre>
<p>This should work. </p>
| -1 | 2016-08-01T12:34:32Z | [
"python",
"selenium"
] |
Python QtGui Create drop down list with buttons | 38,699,013 | <p>I have to create a drop down list in QtGui, and I need the option to click on the items.</p>
<p>I tried to use- QtGui.QComboBox(), but the items opened like comboBox- the selected item appear in the middle of the list and when the windows is small- I can't see all the items.</p>
<p>I tried also to create a class: ... | 1 | 2016-08-01T12:32:29Z | 38,700,346 | <p>Your question is very interesting!!
I have been thinking a lot for giving you an appropriate answer, but I really don't have one...
The only thing I have in mind is waiting for an answer from the stack-overflow experts...</p>
<p>Good luck and keep asking such questions!!</p>
| 0 | 2016-08-01T13:37:12Z | [
"python",
"combobox",
"dropdown",
"qtgui"
] |
Python QtGui Create drop down list with buttons | 38,699,013 | <p>I have to create a drop down list in QtGui, and I need the option to click on the items.</p>
<p>I tried to use- QtGui.QComboBox(), but the items opened like comboBox- the selected item appear in the middle of the list and when the windows is small- I can't see all the items.</p>
<p>I tried also to create a class: ... | 1 | 2016-08-01T12:32:29Z | 38,722,900 | <p>You can override the combobox stylesheet:</p>
<pre><code>combo.setStyleSheet("QComboBox { combobox-popup: 0; }")
</code></pre>
<p>and it will show the items like drop-down list.</p>
| 0 | 2016-08-02T14:13:42Z | [
"python",
"combobox",
"dropdown",
"qtgui"
] |
Web2PY caching password | 38,699,035 | <p>I'm just starting to use Web2PY.
My basic one page app authenticates users to a AD based LDAP service.
I need to collect other data via rest api calls on behave of the user from the server side of the app.
I'd like to cache the username and password of the user for a session so the user doesn't have to be prompte... | 0 | 2016-08-01T12:33:35Z | 38,837,806 | <p>Just wanted to close out on this in case someone in the future is looking at this as well.</p>
<p>I was able to capture the password used to login by adding the following to my db.py</p>
<p>def on_ldap_connect(form):<br>
  username = request.vars.username<br>
  password = request.vars.password<... | 0 | 2016-08-08T20:17:22Z | [
"python"
] |
Create XML file in Python using minidom (more than one parented element) | 38,699,080 | <p>I'm currently attempting to create a double-parented XML file within Python using minidom, however I'm struggling to get it to work (and by struggling I mean it's not)</p>
<p>I'm trying to create something like this:</p>
<pre><code><?xml version="1.0"?>
<twitter>
<account>
<name>... | 0 | 2016-08-01T12:35:54Z | 38,699,304 | <p>Instead of e.g. <code>nameContent.appendChild(nameElement)</code> you need e.g <code>nameElement.appendChild(nameContent)</code> as you need to append the text node create to the element node created earlier.</p>
| 0 | 2016-08-01T12:46:04Z | [
"python",
"xml",
"minidom"
] |
Strip everything after list of possible delimiters without regex | 38,699,114 | <p>I have a list of possible delimiters. I am processing a few thousand strings and need to strip everything after one of the delimiters is found. Note: There will never be a case when more than 1 delimiter is in the string.</p>
<p>Example:</p>
<pre><code>patterns = ['abc', 'def']
example_string = 'hello world abc 12... | 1 | 2016-08-01T12:37:23Z | 38,699,248 | <p>You could use the <a href="https://docs.python.org/2/library/string.html#string.find" rel="nofollow">find</a> function. Here each pattern is checked and if found the string is sliced at the start location of the pattern (or the end location of the pattern by adding the length of the pattern, as in the example):</p>
... | 3 | 2016-08-01T12:43:11Z | [
"python",
"regex"
] |
Strip everything after list of possible delimiters without regex | 38,699,114 | <p>I have a list of possible delimiters. I am processing a few thousand strings and need to strip everything after one of the delimiters is found. Note: There will never be a case when more than 1 delimiter is in the string.</p>
<p>Example:</p>
<pre><code>patterns = ['abc', 'def']
example_string = 'hello world abc 12... | 1 | 2016-08-01T12:37:23Z | 38,699,257 | <p>using the find methode </p>
<blockquote>
<p>string.find(s, sub[, start[, end]])</p>
</blockquote>
<p>Return the lowest index in s where the substring sub is found such that sub is wholly contained in s[start:end]. Return -1 on failure. Defaults for start and end and interpretation of negative values is the same ... | 2 | 2016-08-01T12:43:33Z | [
"python",
"regex"
] |
Strip everything after list of possible delimiters without regex | 38,699,114 | <p>I have a list of possible delimiters. I am processing a few thousand strings and need to strip everything after one of the delimiters is found. Note: There will never be a case when more than 1 delimiter is in the string.</p>
<p>Example:</p>
<pre><code>patterns = ['abc', 'def']
example_string = 'hello world abc 12... | 1 | 2016-08-01T12:37:23Z | 38,699,265 | <p>You can abuse list comprehension and slicing:</p>
<pre><code>delimiters = ['a', 'b']
s = 'nvcakl'
s = [s[:s.index(i) + 1] for i in delimiters if i in s]
print(s)
>> ['nvca']
</code></pre>
<p>This will work even if more than one delimiter is found, each index in the output list will correspond to the found de... | 3 | 2016-08-01T12:44:02Z | [
"python",
"regex"
] |
Azure Streaming Analytics input/output | 38,699,181 | <p>I implemented a very simple Streaming Analytics query:</p>
<pre><code>SELECT
Collect()
FROM
Input TIMESTAMP BY ts
GROUP BY
TumblingWindow(second, 3)
</code></pre>
<p>I produce on an event hub input with a python script:</p>
<pre><code>...
iso_ts = datetime.fromtimestamp(ts).isoformat()
data = dict(ts=... | 0 | 2016-08-01T12:40:48Z | 38,706,082 | <p>Can you check the Service Bus queue from Azure portal for number of messages received?</p>
| 0 | 2016-08-01T18:52:53Z | [
"python",
"azure",
"azureservicebus",
"azure-stream-analytics"
] |
Azure Streaming Analytics input/output | 38,699,181 | <p>I implemented a very simple Streaming Analytics query:</p>
<pre><code>SELECT
Collect()
FROM
Input TIMESTAMP BY ts
GROUP BY
TumblingWindow(second, 3)
</code></pre>
<p>I produce on an event hub input with a python script:</p>
<pre><code>...
iso_ts = datetime.fromtimestamp(ts).isoformat()
data = dict(ts=... | 0 | 2016-08-01T12:40:48Z | 38,718,114 | <p>I discovered that my question was a duplicate of <a href="http://stackoverflow.com/questions/31859156/basic-query-with-timestamp-by-not-producing-output">Basic query with TIMESTAMP by not producing output</a>.</p>
<p>So, the solution is that you cannot use data from the seventies, because streaming analytics will c... | 0 | 2016-08-02T10:36:09Z | [
"python",
"azure",
"azureservicebus",
"azure-stream-analytics"
] |
Alternative to exec | 38,699,273 | <p>I'm currently trying to code a Python (3.4.4) GUI with tkinter which should allow to fit an arbitrary function to some datapoints. To start easy, I'd like to create some input-function and evaluate it. Later, I would like to plot and fit it using <code>curve_fit</code> from <code>scipy</code>.</p>
<p>In order to do... | 0 | 2016-08-01T12:44:44Z | 38,699,981 | <p>I'm not sure what exactly are you trying to do, i.e. what functions are allowed, what operations are permitted, etc.</p>
<p>Here is an example of a function generator with one dynamic parameter:</p>
<pre><code>>>> def generator(n):
def f(x):
return x+n
return f
>>> plu... | 0 | 2016-08-01T13:17:36Z | [
"python"
] |
Alternative to exec | 38,699,273 | <p>I'm currently trying to code a Python (3.4.4) GUI with tkinter which should allow to fit an arbitrary function to some datapoints. To start easy, I'd like to create some input-function and evaluate it. Later, I would like to plot and fit it using <code>curve_fit</code> from <code>scipy</code>.</p>
<p>In order to do... | 0 | 2016-08-01T12:44:44Z | 38,700,564 | <p>The problem with exec/eval, is that they can execute arbitrary code. So to use <code>exec</code> or <code>eval</code> you need to either carefully parse the code fragment to ensure it doesn't contain malicious code (an incredibly hard task), or be sure that the source of the code can be trusted. If you're making a s... | 1 | 2016-08-01T13:48:01Z | [
"python"
] |
TypeError when using a method from a class - python | 38,699,332 | <p>I have an improved kmeans algorithm (KPlusPlus) that builds on the class kmeans. Detk is another class inherited from KPlusPlus.</p>
<p>The objective of the KPlusPlus class is to find out the optimal seeding for finding the kmeans centroids (<a href="https://datasciencelab.wordpress.com/2014/01/15/improved-seeding-... | 0 | 2016-08-01T12:47:41Z | 38,740,371 | <p>The error is due to the failure of the kmeans algorithm to find the cluster centres when the number of clusters is just 1. Hence the cluster dictionary is not created for this case. So, added an extra line of code in the class <code>DetK</code> which checks if the type of cluster dictionary is <code>'NoneType'</code... | 0 | 2016-08-03T10:00:45Z | [
"python",
"k-means"
] |
Multi Threading for PuLP library in python | 38,699,360 | <p>I want to solve an optimisation problem using PuLP library in python. My optimisation problem has >10000 variables and lot of constraints. It takes very long time for PuLP to solve such big problems. Is there any way we can implement multi threading and gain speed ?</p>
<p>Any other solution/library for such big op... | 0 | 2016-08-01T12:49:01Z | 38,701,095 | <p>Linear programming has not been very amenable to paralelisation, so your best bet to make the problem faster is either to use a different solver or to reformulate your problem.</p>
<p>You can get a feel for the speed at which other solvers can solve your problem by generating an MPS file (using the <code>writeMPS()... | 1 | 2016-08-01T14:13:16Z | [
"python",
"multithreading",
"python-3.x",
"pulp"
] |
Extracting rows from an extremely large (48GB) CSV file based on condition | 38,699,520 | <p>I have an extremely large CSV file which has more than 500 million rows. </p>
<p>But <strong>I only need a few thousand rows from it based on a certain condition.</strong>
I am at the moment using:</p>
<pre><code>with open('/home/Documents/1681.csv', 'rb') as f:
reader = csv.DictReader(f)
rows = [row for ... | 2 | 2016-08-01T12:56:28Z | 38,699,681 | <p>You can do this using <code>pandas</code>:</p>
<pre><code>import pandas as pd
chunk_list=[]
for chunk in pd.read_csv('/home/Documents/1681.csv', chunksize=10000):
chunk_list.append(chunk[chunk['flag_central'] == 1]`
final_df = pd.concat(chunk_list)
</code></pre>
<p>Basically this will read 10000 rows at a ti... | 3 | 2016-08-01T13:03:52Z | [
"python",
"csv",
"for-loop",
"condition",
"extraction"
] |
Extracting rows from an extremely large (48GB) CSV file based on condition | 38,699,520 | <p>I have an extremely large CSV file which has more than 500 million rows. </p>
<p>But <strong>I only need a few thousand rows from it based on a certain condition.</strong>
I am at the moment using:</p>
<pre><code>with open('/home/Documents/1681.csv', 'rb') as f:
reader = csv.DictReader(f)
rows = [row for ... | 2 | 2016-08-01T12:56:28Z | 38,699,728 | <p>You could use <a href="http://pandas.pydata.org/" rel="nofollow">Pandas</a>. The only caveat I would have would be that with such a large file you would need to import the file in portions.</p>
<pre><code>import pandas as pd
tp = pd.read_csv('/home/Documents/1681.csv', iterator=True, chunksize=10000)
df = pd.concat... | 2 | 2016-08-01T13:06:17Z | [
"python",
"csv",
"for-loop",
"condition",
"extraction"
] |
Extracting rows from an extremely large (48GB) CSV file based on condition | 38,699,520 | <p>I have an extremely large CSV file which has more than 500 million rows. </p>
<p>But <strong>I only need a few thousand rows from it based on a certain condition.</strong>
I am at the moment using:</p>
<pre><code>with open('/home/Documents/1681.csv', 'rb') as f:
reader = csv.DictReader(f)
rows = [row for ... | 2 | 2016-08-01T12:56:28Z | 38,699,778 | <p>If this is a one-time task, I would suggest using unix commands first, then process the extract:</p>
<pre><code>cat file | awk -F , '{ if ($5 == "1") print $0 }' > extract.csv
</code></pre>
<p>where -F specifies the column delimiter and 5 is the column number. figure this out first by </p>
<pre><code>cat file ... | 1 | 2016-08-01T13:08:39Z | [
"python",
"csv",
"for-loop",
"condition",
"extraction"
] |
Extracting rows from an extremely large (48GB) CSV file based on condition | 38,699,520 | <p>I have an extremely large CSV file which has more than 500 million rows. </p>
<p>But <strong>I only need a few thousand rows from it based on a certain condition.</strong>
I am at the moment using:</p>
<pre><code>with open('/home/Documents/1681.csv', 'rb') as f:
reader = csv.DictReader(f)
rows = [row for ... | 2 | 2016-08-01T12:56:28Z | 38,738,296 | <p>If this is a repetitive process and/or you have more complex conditions to process, here is a fast, low-memory approach in Python that will get you there quickly:</p>
<pre><code>#!/usr/bin/env python
# put this in parsecsv.py, then chmod +x parsecsv.py
import sys
output = lambda l: sys.stdout.write(l)
for line in ... | 1 | 2016-08-03T08:26:44Z | [
"python",
"csv",
"for-loop",
"condition",
"extraction"
] |
Select rows from a DataFrame by date_range | 38,699,561 | <p>i have the following dataframe:</p>
<pre><code> FAK_ART FAK_DAT LEIST_DAT KD_CRM MW_BW EQ_NR MATERIAL \
0 ZPAF 2015-05-18 2015-05-31 TMD E 1003507107 G230ETS
1 ZPAF 2015-05-18 2015-05-31 TMD B 1003507107 G230ETS
2 ZPAF 2015-05-18 2015-0... | 1 | 2016-08-01T12:58:14Z | 38,699,644 | <p>You can <a href="http://pandas.pydata.org/pandas-docs/stable/generated/pandas.DataFrame.set_index.html" rel="nofollow"><code>set_index</code></a> from column <code>LEIST_DAT</code> and then select by <a href="http://pandas.pydata.org/pandas-docs/stable/generated/pandas.DataFrame.ix.html" rel="nofollow"><code>ix</cod... | 3 | 2016-08-01T13:02:16Z | [
"python",
"pandas"
] |
How to read csv file with date as one of the data? | 38,699,581 | <p>These are my data both in excel and in csv files:</p>
<p>Date,Time,Product_Type
2015-01-02,02:29:45 PM,Cards</p>
<p>I've tried this code below and it works well with the excel file but not in CSV file.</p>
<pre><code>import numpy as np
import pandas as pd
df = pd.read_excel('file.xlsx')
print(df.head())
</code><... | 0 | 2016-08-01T12:59:23Z | 38,700,149 | <p>I'm not sure exactly what you plan to do with the data once its pulled from the file so if you need a different format or something let me know. </p>
<p>I'm assuming you'll always be working with a CSV for this code. The code below simply opens your file and for every line, splits by the commas, and appends to a ... | 0 | 2016-08-01T13:27:02Z | [
"python",
"csv",
"pandas",
"time-series"
] |
How to read csv file with date as one of the data? | 38,699,581 | <p>These are my data both in excel and in csv files:</p>
<p>Date,Time,Product_Type
2015-01-02,02:29:45 PM,Cards</p>
<p>I've tried this code below and it works well with the excel file but not in CSV file.</p>
<pre><code>import numpy as np
import pandas as pd
df = pd.read_excel('file.xlsx')
print(df.head())
</code><... | 0 | 2016-08-01T12:59:23Z | 38,719,714 | <p>I have modified and removed the column names on my csv file and used this code below. It works! </p>
<p>CSV File Data</p>
<pre><code> 2015-01-02,02:29:45 PM,Cards
2015-01-02,05:16:15 PM,Cards
2015-01-02,05:48:46 PM,Cards
2015-01-02,03:18:34 PM,Cards
2015-01-02,05:22:55 PM,Cards
</code></pre>
<p... | 0 | 2016-08-02T11:52:40Z | [
"python",
"csv",
"pandas",
"time-series"
] |
Spliting a string list to floats - memory error | 38,699,603 | <p>I can't handle with splitting a list of strings to a list of floats. I open a text file (.vol, but it just contains text) which last line is an extremely long line of numbers. </p>
<blockquote>
<p>Params1 437288.59375000 102574.20312500 -83.30001831<br>
Params2 437871.93750000 104981.40625000 362.10000610<br>
... | 1 | 2016-08-01T13:00:25Z | 38,700,222 | <p>Your problem here (as mentioned in the comments) is:</p>
<p>1) In the first case you are trying to index into the string before you split it and you are attempting to convert spaces to floats (hence the <code>ValueError</code>)</p>
<p>2) In the second case there are probably too many numbers in the list and you ar... | 0 | 2016-08-01T13:30:43Z | [
"python",
"string",
"split",
"out-of-memory"
] |
Spliting a string list to floats - memory error | 38,699,603 | <p>I can't handle with splitting a list of strings to a list of floats. I open a text file (.vol, but it just contains text) which last line is an extremely long line of numbers. </p>
<blockquote>
<p>Params1 437288.59375000 102574.20312500 -83.30001831<br>
Params2 437871.93750000 104981.40625000 362.10000610<br>
... | 1 | 2016-08-01T13:00:25Z | 38,700,568 | <p>If I understand it correctly, you cannot make txt[9].split() and map it like this: <code>map(float, txt[9].split())</code> because the txt[9] is too large. </p>
<p>You can try this generator:</p>
<pre><code>def float_generator(txt):
x = ''
for c in txt:
if c != ' ':
x +=... | 0 | 2016-08-01T13:48:08Z | [
"python",
"string",
"split",
"out-of-memory"
] |
Removing numbers mixed with letters from string | 38,699,616 | <p>Suppose I have a string such as :</p>
<pre><code>string = 'This string 22 is not yet perfect1234 and 123pretty but it can be.'
</code></pre>
<p>I want to remove any numbers <strong>which are mixed with words</strong>, such as <code>'perfect1234'</code> and <code>'123pretty'</code>, <strong>but not</strong> <code>'... | -5 | 2016-08-01T13:00:57Z | 38,699,711 | <pre><code>import re
re.sub(r'\d+', '', string)
</code></pre>
| 1 | 2016-08-01T13:05:12Z | [
"python",
"regex",
"string"
] |
Removing numbers mixed with letters from string | 38,699,616 | <p>Suppose I have a string such as :</p>
<pre><code>string = 'This string 22 is not yet perfect1234 and 123pretty but it can be.'
</code></pre>
<p>I want to remove any numbers <strong>which are mixed with words</strong>, such as <code>'perfect1234'</code> and <code>'123pretty'</code>, <strong>but not</strong> <code>'... | -5 | 2016-08-01T13:00:57Z | 38,699,827 | <pre><code>s = 'This string 22 is not yet perfect1234 and 123pretty but it can be.'
new_s = ""
for word in s.split(' '):
if any(char.isdigit() for char in word) and any(c.isalpha() for c in word):
new_s += ''.join([i for i in word if not i.isdigit()])
else:
new_s += word
new_s += ' '
</code... | 1 | 2016-08-01T13:11:09Z | [
"python",
"regex",
"string"
] |
Removing numbers mixed with letters from string | 38,699,616 | <p>Suppose I have a string such as :</p>
<pre><code>string = 'This string 22 is not yet perfect1234 and 123pretty but it can be.'
</code></pre>
<p>I want to remove any numbers <strong>which are mixed with words</strong>, such as <code>'perfect1234'</code> and <code>'123pretty'</code>, <strong>but not</strong> <code>'... | -5 | 2016-08-01T13:00:57Z | 38,699,831 | <p>The code below checks each character for a digit. If it isn't a digit, it adds the character to the end of the corrected string. </p>
<pre><code>string = 'This string is not yet perfect1234 and 123pretty but it can be.'
CorrectedString = ""
for characters in string:
if characters.isdigit():
continue
... | 0 | 2016-08-01T13:11:16Z | [
"python",
"regex",
"string"
] |
Removing numbers mixed with letters from string | 38,699,616 | <p>Suppose I have a string such as :</p>
<pre><code>string = 'This string 22 is not yet perfect1234 and 123pretty but it can be.'
</code></pre>
<p>I want to remove any numbers <strong>which are mixed with words</strong>, such as <code>'perfect1234'</code> and <code>'123pretty'</code>, <strong>but not</strong> <code>'... | -5 | 2016-08-01T13:00:57Z | 38,700,037 | <p>You can try this by simply join function and as well as nothing to import</p>
<pre><code>str_var='This string is not yet perfect1234 and 123pretty but it can be.'
str_var = ''.join(x for x in str_var if not x.isdigit())
print str_var
</code></pre>
<p>output:</p>
<pre><code>'This string is not yet perfect and pre... | 0 | 2016-08-01T13:21:00Z | [
"python",
"regex",
"string"
] |
Removing numbers mixed with letters from string | 38,699,616 | <p>Suppose I have a string such as :</p>
<pre><code>string = 'This string 22 is not yet perfect1234 and 123pretty but it can be.'
</code></pre>
<p>I want to remove any numbers <strong>which are mixed with words</strong>, such as <code>'perfect1234'</code> and <code>'123pretty'</code>, <strong>but not</strong> <code>'... | -5 | 2016-08-01T13:00:57Z | 38,700,096 | <p>If you want to preserve digits that are by themselves (not part of a word with alpha characters in it), this regex will do the job (but there probably is a way to make it simpler):</p>
<pre><code>import re
pattern = re.compile(r"\d*([^\d\W]+)\d*")
s = "This string is not yet perfect1234 and 123pretty but it can be.... | 1 | 2016-08-01T13:23:53Z | [
"python",
"regex",
"string"
] |
Splitting line with escaped separators in Python | 38,699,763 | <p>TL; DR:</p>
<pre><code>line = "one|two|three\|four\|five"
fields = line.split(whatever)
</code></pre>
<p>for what value of <code>whatever</code> does:</p>
<pre><code>fields == ['one', 'two', 'three\|four\|five']
</code></pre>
<p>I have a file delimited by pipe characters. Some of the fields in that file also inc... | -2 | 2016-08-01T13:08:02Z | 38,699,865 | <p>Maybe you can use something like this : </p>
<pre><code>[^\\]\|
</code></pre>
<p>where <code>[^\\]</code> match any caracter different of <code>\</code>.</p>
| 0 | 2016-08-01T13:12:18Z | [
"python",
"regex",
"split",
"negative-lookahead"
] |
Splitting line with escaped separators in Python | 38,699,763 | <p>TL; DR:</p>
<pre><code>line = "one|two|three\|four\|five"
fields = line.split(whatever)
</code></pre>
<p>for what value of <code>whatever</code> does:</p>
<pre><code>fields == ['one', 'two', 'three\|four\|five']
</code></pre>
<p>I have a file delimited by pipe characters. Some of the fields in that file also inc... | -2 | 2016-08-01T13:08:02Z | 38,699,872 | <p>You can use a regex like</p>
<pre><code>re.split(r'([^|]+[^\\])\|', line)
</code></pre>
<p>which will use a character group to specify anything except <code>\</code> followed by a <code>|</code> will be used to do the split</p>
<p>That will give an extra empty match at the beginning of the list, but hopefully you... | 2 | 2016-08-01T13:12:45Z | [
"python",
"regex",
"split",
"negative-lookahead"
] |
Using python hashmap for counting elements | 38,699,817 | <p>When i need to count elements of different type , i find myself writing something like:</p>
<pre><code>if k not in removed:
removed[k] = 0
removed[k] = removed[k] + 1
</code></pre>
<p>Sometimes i do the same thing with a new empty list that will grow over time.
The above code works fine, but it feels like ther... | 0 | 2016-08-01T13:10:56Z | 38,700,135 | <p>In addition to defaultdict/Counter mentioned in comments, you can also have a default value returned from a failed <code>get</code>. This allows you to set the initial count to 0 if the key lookup fails and immediately increment by 1, or increment by 1 each time the key is found as you loop through.</p>
<pre><code>... | 1 | 2016-08-01T13:26:27Z | [
"python",
"hashmap"
] |
Using python hashmap for counting elements | 38,699,817 | <p>When i need to count elements of different type , i find myself writing something like:</p>
<pre><code>if k not in removed:
removed[k] = 0
removed[k] = removed[k] + 1
</code></pre>
<p>Sometimes i do the same thing with a new empty list that will grow over time.
The above code works fine, but it feels like ther... | 0 | 2016-08-01T13:10:56Z | 38,700,665 | <p>One way to do it:</p>
<pre><code>countdict = dict()
for k in inputlist:
if k not in countdict.keys():
countdict[k] = inputlist.count(k)
</code></pre>
| 0 | 2016-08-01T13:51:51Z | [
"python",
"hashmap"
] |
Using python hashmap for counting elements | 38,699,817 | <p>When i need to count elements of different type , i find myself writing something like:</p>
<pre><code>if k not in removed:
removed[k] = 0
removed[k] = removed[k] + 1
</code></pre>
<p>Sometimes i do the same thing with a new empty list that will grow over time.
The above code works fine, but it feels like ther... | 0 | 2016-08-01T13:10:56Z | 38,700,750 | <p>This is exactly what the <code>Counter</code> is for!
<a href="https://docs.python.org/2/library/collections.html#collections.Counter" rel="nofollow">https://docs.python.org/2/library/collections.html#collections.Counter</a></p>
| 0 | 2016-08-01T13:55:47Z | [
"python",
"hashmap"
] |
Create a vector graphics (svg, eps, pdf) "heatmap" from 2d function with colorbar | 38,699,838 | <p>I want to plot a 2d hanning window function for a picture with <code>N=512</code> pixels with a colorbar as vector graphics (<code>*.svg</code>, <code>*.eps</code>, (vectorized!) <code>*.pdf</code> or so)...
So I need to plot a 2d function</p>
<pre><code>w(x,y) = sin(x*pi/N)^2 * sin(y*pi/N)^2
</code></pre>
<p>My s... | 1 | 2016-08-01T13:11:25Z | 38,700,632 | <p>With a PDF, SVG or EPS terminal, gnuplot <strong>does</strong> give you vector graphics. <strong>But</strong> the function has to be represented in some way, and what gnuplot does is a piecewise linear interpolation, that is, the surface is represented by small portions of plane (triangles or quadrangles), the numbe... | 1 | 2016-08-01T13:50:42Z | [
"python",
"plot",
"gnuplot",
"vector-graphics"
] |
Series to Dataframe conversion with column indexing | 38,699,893 | <p>There is a Series called <code>location_ratings</code> as below :</p>
<pre><code>location_ratings = location['Location'].value_counts()
</code></pre>
<p>Below is the location_ratings's sample output:</p>
<pre><code> Location
Brazil 180
Alaska ... | 1 | 2016-08-01T13:13:41Z | 38,700,077 | <p>You can first change index name by <a href="http://pandas.pydata.org/pandas-docs/stable/whatsnew.html#changes-to-rename" rel="nofollow"><code>rename_axis</code></a> (new in <code>pandas</code> <code>0.18.0</code>) and then <a href="http://pandas.pydata.org/pandas-docs/stable/generated/pandas.DataFrame.reset_index.ht... | 0 | 2016-08-01T13:23:15Z | [
"python",
"python-3.x",
"pandas",
"dataframe",
"multiple-columns"
] |
Series to Dataframe conversion with column indexing | 38,699,893 | <p>There is a Series called <code>location_ratings</code> as below :</p>
<pre><code>location_ratings = location['Location'].value_counts()
</code></pre>
<p>Below is the location_ratings's sample output:</p>
<pre><code> Location
Brazil 180
Alaska ... | 1 | 2016-08-01T13:13:41Z | 38,729,396 | <pre><code>D1 = location_ratings.rename_axis('Location').reset_index(name='Ratings')
</code></pre>
| 0 | 2016-08-02T19:57:56Z | [
"python",
"python-3.x",
"pandas",
"dataframe",
"multiple-columns"
] |
Django: Know when a file is already saved after usign storage.save() | 38,699,927 | <p>So I've a Django model which has a FileField. This FileField, contains generally an image. After I receipt the picture from a request, I need to run some picture analysis processes. </p>
<p>The problem is that sometimes, I need to rotate the picture before running the analysis (which runs in celery, loading the mod... | 0 | 2016-08-01T13:15:12Z | 38,701,216 | <p>No magic solution here. You have to manage states on your model, specially when working with celery tasks. You might need another field called <code>state</code> with the states: <code>NONE</code> (no action is beeing done), <code>PROCESSING</code> (task was sent to celery to process) and <code>DONE</code> (image wa... | 0 | 2016-08-01T14:18:35Z | [
"python",
"django",
"amazon-web-services",
"amazon-s3"
] |
The code does not work when I update a variable | 38,700,060 | <p>I'm trying to display two images of cards in a simple GUI(can only be accessed online at <a href="http://www.codeskulptor.org/#user41_8Poew9PXI8_1.py" rel="nofollow">http://www.codeskulptor.org/#user41_8Poew9PXI8_1.py</a>)</p>
<pre><code>import simplegui
#images to be displayed
ace_hearts = simplegui.load_image("h... | 0 | 2016-08-01T13:22:18Z | 38,700,234 | <p>Second and fourth parameter given to <a href="http://www.codeskulptor.org/docs.html#draw_image" rel="nofollow"><code>draw_image</code></a> are <code>center_source</code> and <code>center_dest</code>. When you draw the second image you need to keep <code>center_source</code> the same and only modify <code>center_dest... | 1 | 2016-08-01T13:31:50Z | [
"python",
"list",
"python-2.7"
] |
I want to name my columns the numbers from 2 for loops | 38,700,194 | <p>I am running a double for loop of the form </p>
<pre><code>for i in range (0,5):
for j in range (0,5):
colname = '%i%j' %{'i':'i','j':'j'}
df[colname] = poisson.pmf(i,df['lambda'])*poisson.pmf(j,df['mu'])
</code></pre>
<p>I would like for the code to return the 36 extra columns of 00 up to 55 ... | -1 | 2016-08-01T13:29:10Z | 38,700,670 | <p>I think you need <code>range(6)</code> and <code>%d</code>:</p>
<pre><code>for i in range (6):
for j in range (6):
colname = '%d%d' % (i, j)
print (colname)
</code></pre>
<pre><code>00
01
02
03
04
05
10
11
12
13
14
15
20
21
22
23
24
25
30
31
32
33
34
35
40
41
42
43
44
45
50
51
52
53
54
55
</c... | 1 | 2016-08-01T13:52:03Z | [
"python",
"pandas",
"for-loop"
] |
Pyomo: Access Solution From Python Code | 38,700,214 | <p>I have a linear integer programme I want to solve. I installed solver glpk (thanks to <a href="http://stackoverflow.com/questions/20690195/how-do-you-install-glpk-solver-along-with-pyomo-in-winpython/37918417#37918417">this answer</a>) and pyomo. I wrote code like this:</p>
<pre><code>from pyomo.environ import *
fr... | 0 | 2016-08-01T13:30:25Z | 38,707,092 | <p>I'm not sure if this is what you are looking for, but this is a way that I have some variables being printed in one of my scripts. </p>
<pre><code>from pyomo.environ import *
from pyomo.opt import SolverFactory
from pyomo.core import Var
M = AbstractModel()
opt = SolverFactory('glpk')
# Vars, Params, Objective, C... | 2 | 2016-08-01T19:56:33Z | [
"python",
"optimization",
"mathematical-optimization",
"linear-programming",
"pyomo"
] |
Pyomo: Access Solution From Python Code | 38,700,214 | <p>I have a linear integer programme I want to solve. I installed solver glpk (thanks to <a href="http://stackoverflow.com/questions/20690195/how-do-you-install-glpk-solver-along-with-pyomo-in-winpython/37918417#37918417">this answer</a>) and pyomo. I wrote code like this:</p>
<pre><code>from pyomo.environ import *
fr... | 0 | 2016-08-01T13:30:25Z | 39,146,463 | <p>Here's a modified version of your script that illustrates two different ways of printing variable values: (1) by explicitly referencing each variable and (2) by iterating over all variables in the model.</p>
<pre><code># Pyomo v4.4.1
# Python 2.7
from pyomo.environ import *
from pyomo.opt import SolverFactory
a =... | 0 | 2016-08-25T13:18:48Z | [
"python",
"optimization",
"mathematical-optimization",
"linear-programming",
"pyomo"
] |
ValueError: could not convert string to float | 38,700,249 | <p>So... I have this primitive calculator that runs fine on my cellphone, but when I try to run it on Windows 10 I get...</p>
<blockquote>
<p>ValueError: could not convert string to float</p>
</blockquote>
<p>I don't know what the problem is, I've tried using <code>raw_input</code> but it doesn't work ether. Please... | 1 | 2016-08-01T13:32:39Z | 38,700,413 | <p>your code only convert string that are integers like in below statement</p>
<pre><code>num1 = float(input ()) #take a float and store it ex 13
print num1 # output 13.0
</code></pre>
<p>if you provide <code>13</code> as a input it will give the output as <code>13.0</code>
but if you provide <code>SOMEONEE</code> as... | 1 | 2016-08-01T13:40:29Z | [
"python"
] |
ValueError: could not convert string to float | 38,700,249 | <p>So... I have this primitive calculator that runs fine on my cellphone, but when I try to run it on Windows 10 I get...</p>
<blockquote>
<p>ValueError: could not convert string to float</p>
</blockquote>
<p>I don't know what the problem is, I've tried using <code>raw_input</code> but it doesn't work ether. Please... | 1 | 2016-08-01T13:32:39Z | 38,700,450 | <p>I think this is happening because in some cases 'input' contains non-numerical characters. Python is smart and when a string only contains numbers, it can be converted from string to float. When the string contains non-numerical characters, it is not possible for Python to convert it to a float.</p>
<p>You could fi... | 0 | 2016-08-01T13:42:49Z | [
"python"
] |
(Python) Converting image time series to ROS bag | 38,700,271 | <p>I have a set of images with metadata including time stamps and odometry data from a data set. I want to convert this time series of images into a rosbag so I can easily plug it out of the code I'll write and switch in real time data after testing. By the tutorial, the process of programmatically saving data to a ros... | 1 | 2016-08-01T13:33:27Z | 38,702,418 | <p>Many of the standard message types like <a href="http://docs.ros.org/api/sensor_msgs/html/msg/Image.html" rel="nofollow">sensor_msgs/Image</a> or <a href="http://docs.ros.org/jade/api/nav_msgs/html/msg/Odometry.html" rel="nofollow">nav_msgs/Odometry</a> have an attribute <a href="http://docs.ros.org/api/std_msgs/htm... | 1 | 2016-08-01T15:14:47Z | [
"python",
"opencv",
"ros"
] |
how to put dictionary data in to data frame and can that data frame be converted in csv file? | 38,700,299 | <pre><code>import random
import pandas as pd
import numpy as np
heart_rate = [random.randrange(45,125) for _ in range(100)]
blood_pressure_systolic = [random.randrange(140,230) for _ in range(100)]
blood_pressure_dyastolic = [random.randrange(90,140) for _ in range(100)]
temperature = [random.randrange(34,42) for _ i... | 0 | 2016-08-01T13:34:42Z | 38,700,482 | <p>You're almost there. What you want is:</p>
<pre><code>vitalsign = {'heart' : heart_rate,
'blood' : blood_pressure_systolic,
'temp' : temperature,
'pulse' : pulse_oximetry}
df = pd.DataFrame(vitalsign)
</code></pre>
<p>To convert this to .csv:</p>
<pre><code>df.to_csv('your_f... | 0 | 2016-08-01T13:44:16Z | [
"python",
"dataframe"
] |
How to filter haystack results with db query | 38,700,440 | <p>I need to text-search across my model and filter with db queries at the same time.</p>
<p>For example:</p>
<pre><code>class MyModel(models.Model):
text = models.TextField()
users = models.ManyToMany(User)
class MyModelIndexIndex(indexes.SearchIndex, indexes.Indexable):
text = indexes.CharField(documen... | 7 | 2016-08-01T13:42:20Z | 38,866,990 | <p>In the general case, it's (probably) not possible to solve your problem using just one query. For instance, if you are using ElasticSearch as a search backend engine and MySQL for django models, there is no way MySQL and ElasticSearch will communicate to produce a single, common query.</p>
<p>However, there should ... | 1 | 2016-08-10T07:35:21Z | [
"python",
"django",
"django-haystack"
] |
Create folder with today's date and move 100's of pdfs | 38,700,448 | <p>I want to create a new folder each day with the folder title being the date of that day. So today's would be 01082016 and tomorrow will be 02082016 etc. I know how to make this folder but I'm struggling to choose the destination of this folder.</p>
<p>Also I'd like to move a large number of PDFs from the FTP fold... | 0 | 2016-08-01T13:42:44Z | 38,700,647 | <p>You can easily create the folder wherever you like (as long as the permissions are correct).
Check if the folder currently exists and create it if not:</p>
<pre><code>directory = "example/dir/" + time.strftime("%d%m%y")
if not os.path.exists(directory):
os.makedirs(directory)
</code></pre>
<p>Getting the files... | 0 | 2016-08-01T13:51:24Z | [
"python",
"pdf",
"folders"
] |
How (in what form) to share (deliver) a Python function? | 38,700,517 | <p>The final outcome of my work should be a Python function that takes a JSON object as the only input and return another JSON object as output. To keep it more specific, I am a data scientist, and the function that I am speaking about, is derived from data and it delivers predictions (in other words, it is a machine l... | 19 | 2016-08-01T13:46:07Z | 38,771,976 | <p>You have the right idea with using a socket but there are tons of frameworks doing exactly what you want. Like <a href="http://stackoverflow.com/users/6464893/hleggs">hleggs</a>, I suggest you checkout <a href="http://flask.pocoo.org/">Flask</a> to build a microservice. This will let the other team post JSON objects... | 9 | 2016-08-04T15:48:25Z | [
"python",
"sockets",
"deployment",
"publish"
] |
How (in what form) to share (deliver) a Python function? | 38,700,517 | <p>The final outcome of my work should be a Python function that takes a JSON object as the only input and return another JSON object as output. To keep it more specific, I am a data scientist, and the function that I am speaking about, is derived from data and it delivers predictions (in other words, it is a machine l... | 19 | 2016-08-01T13:46:07Z | 38,778,851 | <p>I guess you have 3 possibilities :</p>
<ul>
<li>convert python function to javascript function:</li>
</ul>
<p><em>Assuming the "tech-team" use Javascript for web-service, you may try to convert your python function directly to a Javascript function (which will be really easy to integrate on web page) using <a href... | -1 | 2016-08-04T23:21:19Z | [
"python",
"sockets",
"deployment",
"publish"
] |
How (in what form) to share (deliver) a Python function? | 38,700,517 | <p>The final outcome of my work should be a Python function that takes a JSON object as the only input and return another JSON object as output. To keep it more specific, I am a data scientist, and the function that I am speaking about, is derived from data and it delivers predictions (in other words, it is a machine l... | 19 | 2016-08-01T13:46:07Z | 38,821,742 | <p>Your task is (in generality) about productionizing a machine learning model, where the consumer of the model may not be working in the same environment as the one which was used to develop the model. I've been trying to tackle this problem since past few years. The problem is faced by many companies and it is aggrav... | 0 | 2016-08-08T05:18:01Z | [
"python",
"sockets",
"deployment",
"publish"
] |
How (in what form) to share (deliver) a Python function? | 38,700,517 | <p>The final outcome of my work should be a Python function that takes a JSON object as the only input and return another JSON object as output. To keep it more specific, I am a data scientist, and the function that I am speaking about, is derived from data and it delivers predictions (in other words, it is a machine l... | 19 | 2016-08-01T13:46:07Z | 38,884,914 | <p>As already suggested in other answers the best option would be creating a simple web service. Besides Flask you may want to try <a href="http://bottlepy.org" rel="nofollow">bottle</a> which is very thin one-file web framework. Your service may looks as simple as:</p>
<pre><code>from bottle import route, run, reques... | 0 | 2016-08-10T23:03:38Z | [
"python",
"sockets",
"deployment",
"publish"
] |
How (in what form) to share (deliver) a Python function? | 38,700,517 | <p>The final outcome of my work should be a Python function that takes a JSON object as the only input and return another JSON object as output. To keep it more specific, I am a data scientist, and the function that I am speaking about, is derived from data and it delivers predictions (in other words, it is a machine l... | 19 | 2016-08-01T13:46:07Z | 38,891,638 | <p>My understanding of your question boils down to: </p>
<p><em>How can I share a Python library with the rest of my team, that may not be using Python otherwise?</em></p>
<p><em>And how can I make sure my code and its dependencies are what the receiving team will run?</em></p>
<p><em>And that the receiving team can... | 2 | 2016-08-11T08:52:49Z | [
"python",
"sockets",
"deployment",
"publish"
] |
One-liner to save value of if statement? | 38,700,537 | <p>Is there a smart way to write the following code in three or four lines?</p>
<pre><code>a=l["artist"]
if a:
b=a["projects"]
if b:
c=b["project"]
if c:
print c
</code></pre>
<p>So I thought for something like pseudocode:</p>
<pre><code>a = l["artist"] if True:
</code></pre>
| 3 | 2016-08-01T13:46:58Z | 38,700,625 | <p>I don't necessarily think that this is better but you could do:</p>
<pre><code>try:
c = l["artist"]["projects"]["project"]
except (KeyError, TypeError) as e:
print e
pass
</code></pre>
| 5 | 2016-08-01T13:50:23Z | [
"python",
"variables",
"if-statement"
] |
One-liner to save value of if statement? | 38,700,537 | <p>Is there a smart way to write the following code in three or four lines?</p>
<pre><code>a=l["artist"]
if a:
b=a["projects"]
if b:
c=b["project"]
if c:
print c
</code></pre>
<p>So I thought for something like pseudocode:</p>
<pre><code>a = l["artist"] if True:
</code></pre>
| 3 | 2016-08-01T13:46:58Z | 38,700,640 | <p>How about:</p>
<pre><code>try:
print l["artist"]["projects"]["project"]
except KeyError:
pass
except TypeError:
pass # None["key"] raises TypeError.
</code></pre>
<p>This will <code>try</code> to <code>print</code> the value, but if a <code>KeyError</code> is raised, the <code>except</code> block will... | 7 | 2016-08-01T13:51:00Z | [
"python",
"variables",
"if-statement"
] |
One-liner to save value of if statement? | 38,700,537 | <p>Is there a smart way to write the following code in three or four lines?</p>
<pre><code>a=l["artist"]
if a:
b=a["projects"]
if b:
c=b["project"]
if c:
print c
</code></pre>
<p>So I thought for something like pseudocode:</p>
<pre><code>a = l["artist"] if True:
</code></pre>
| 3 | 2016-08-01T13:46:58Z | 38,700,741 | <pre><code>p = l.get('artist') and l['artist'].get('projects') and l['artist']['projects'].get('project')
if p:
print p
</code></pre>
<p>You can also make a more general function for this purpose:</p>
<pre><code>def get_attr(lst, attr):
current = lst
for a in attr:
if current.get(a) is not None:
... | 0 | 2016-08-01T13:55:04Z | [
"python",
"variables",
"if-statement"
] |
One-liner to save value of if statement? | 38,700,537 | <p>Is there a smart way to write the following code in three or four lines?</p>
<pre><code>a=l["artist"]
if a:
b=a["projects"]
if b:
c=b["project"]
if c:
print c
</code></pre>
<p>So I thought for something like pseudocode:</p>
<pre><code>a = l["artist"] if True:
</code></pre>
| 3 | 2016-08-01T13:46:58Z | 38,700,768 | <p>One-liner (as in the title) without exceptions:</p>
<pre><code>if "artist" in l and l["artist"] and "projects" in l["artist"] and l["artist"]["projects"] and "project" in l["artist"]["projects"]: print l["artist"]["projects"]["project"]
</code></pre>
| 0 | 2016-08-01T13:56:30Z | [
"python",
"variables",
"if-statement"
] |
One-liner to save value of if statement? | 38,700,537 | <p>Is there a smart way to write the following code in three or four lines?</p>
<pre><code>a=l["artist"]
if a:
b=a["projects"]
if b:
c=b["project"]
if c:
print c
</code></pre>
<p>So I thought for something like pseudocode:</p>
<pre><code>a = l["artist"] if True:
</code></pre>
| 3 | 2016-08-01T13:46:58Z | 38,701,687 | <p>Since you're dealing with nested dictionaries, you might find this generic one-liner useful because it will allow you to access values at any level just by passing it more <code>keys</code> arguments:</p>
<pre><code>nested_dict_get = lambda item, *keys: reduce(lambda d, k: d.get(k), keys, item)
l = {'artist': {'pr... | 0 | 2016-08-01T14:40:47Z | [
"python",
"variables",
"if-statement"
] |
Read image from a path in sys.path inside a Python module | 38,700,617 | <p>I am very new to python and opencv world. I was just trying to read and show an image but I always get an error:</p>
<blockquote>
<p>error:
D:\Build\OpenCV\opencv-3.1.0\modules\highgui\src\window.cpp:289:
error: (-215) size.width>0 && size.height>0 in function cv::imshow</p>
</blockquote>
<p>I have c... | 0 | 2016-08-01T13:50:07Z | 38,700,765 | <p>I'm not sure what you're trying to do in your application but <code>sys.path</code> seems superfluous in the example code. Furthermore, <code>sys.path</code> says in the <a href="https://docs.python.org/2/library/sys.html#sys.path" rel="nofollow">Python documentation</a> that it is </p>
<blockquote>
<p>A list of... | 1 | 2016-08-01T13:56:24Z | [
"python",
"python-3.x",
"opencv"
] |
Read image from a path in sys.path inside a Python module | 38,700,617 | <p>I am very new to python and opencv world. I was just trying to read and show an image but I always get an error:</p>
<blockquote>
<p>error:
D:\Build\OpenCV\opencv-3.1.0\modules\highgui\src\window.cpp:289:
error: (-215) size.width>0 && size.height>0 in function cv::imshow</p>
</blockquote>
<p>I have c... | 0 | 2016-08-01T13:50:07Z | 38,701,247 | <p>What makes you imagine that <code>sys.path</code> settings will affect the directories from which you read files? It's purely used to locate Python modules for import. So to answer your question, the behaviour you are seeing is normal and expected. If you have a directory in <code>dir</code> and a filename in <code>... | 1 | 2016-08-01T14:20:32Z | [
"python",
"python-3.x",
"opencv"
] |
QCheckBox only executes when checked twice | 38,700,666 | <p>I have a QCheckBox (<code>deselect_checkbox</code>) which, when checked, sets another QCheckBox (<code>first_checkbox</code>) and itself to <code>False</code>. However, it only works every other time and I'm not sure why. Here is the code:</p>
<pre><code>def deselect_func():
if self.dockwidget.deselect_checkbox... | 1 | 2016-08-01T13:51:53Z | 38,705,368 | <p>You're mixing up "check-state" and "checked".</p>
<p>The former can have three states: Unchecked, PartiallyChecked, and Checked, whereas the latter is just True/False. If you call <code>setChecked()</code> instead of <code>setCheckState()</code>, a state-change won't be registered. Thus, on the next click, a <code>... | 1 | 2016-08-01T18:06:27Z | [
"python",
"qt-designer",
"qcheckbox"
] |
Pandas: Set multiple MultiColumns as MultiIndex | 38,700,694 | <p>I generate an empty data frame as follows:</p>
<pre><code>topFields = ['desc', 'desc', 'price', 'price', 'units', 'units']
bottomFields = ['foo', 'bar', 'mean', 'mom_2', 'mean', 'mom_2']
resultsDf = pd.DataFrame(columns=pd.MultiIndex.from_arrays([topFields, bottomFields]))
</code></pre>
<p>Now I would like to set ... | 0 | 2016-08-01T13:53:23Z | 38,700,764 | <p>It looks like need <a href="http://pandas.pydata.org/pandas-docs/stable/generated/pandas.DataFrame.set_index.html" rel="nofollow"><code>set_index</code></a> by tuple:</p>
<pre><code>test = resultsDf.set_index(('desc', 'foo'))
print (test)
Empty DataFrame
Columns: [(desc, bar), (price, mean), (price, mom_2), (units,... | 1 | 2016-08-01T13:56:21Z | [
"python",
"pandas"
] |
How to implement "next" for a dictionary object to be iterable? | 38,700,734 | <p>I've got the following wrapper for a dictionary:</p>
<pre><code>class MyDict:
def __init__(self):
self.container = {}
def __setitem__(self, key, value):
self.container[key] = value
def __getitem__(self, key):
return self.container[key]
def __iter__(self):
return se... | 0 | 2016-08-01T13:54:55Z | 38,700,850 | <p>Dictionaries are themselves not an <em>iterator</em> (which can only be iterated over <em>once</em>). You usually make them an <em>iterable</em>, an object for which you can produce multiple <em>iterators</em> instead.</p>
<p>Drop the <code>next</code> method altogether, and have <code>__iter__</code> return an ite... | 5 | 2016-08-01T14:00:33Z | [
"python",
"python-2.7",
"dictionary",
"iterator",
"iterable"
] |
How to implement "next" for a dictionary object to be iterable? | 38,700,734 | <p>I've got the following wrapper for a dictionary:</p>
<pre><code>class MyDict:
def __init__(self):
self.container = {}
def __setitem__(self, key, value):
self.container[key] = value
def __getitem__(self, key):
return self.container[key]
def __iter__(self):
return se... | 0 | 2016-08-01T13:54:55Z | 38,701,186 | <p>If you want to be able to use your dict-like object inside nested loops, for example, or any other application that requires multiple iterations over the same object, then you need to implement an <code>__iter__</code> method that returns a newly-created iterator object.</p>
<p>Python's iterable objects all do this... | 2 | 2016-08-01T14:17:02Z | [
"python",
"python-2.7",
"dictionary",
"iterator",
"iterable"
] |
What is the expected packet loss with scapy? | 38,700,821 | <p>I want to listen to packets on an interface of <code>SystemA</code>. Since it looks like I do not see the vast majority of incoming packets, I used <code>scapy</code> in its simplest form:</p>
<pre><code>import scapy.all as scapy
def filtre(p):
if p.haslayer(scapy.IP):
print(p[scapy.IP].src)
# Disable... | 1 | 2016-08-01T13:58:54Z | 38,869,261 | <p>
You might want to try with something that does not use the output (as this can be a bottleneck). Also, you can use a BPF filter in case you have unwanted packets on the wire. Moreover, since you don't need to dissect the IP payloads, you can prevent Scapy from parsing the whole packet layers.</p>
<pre><code>from c... | 0 | 2016-08-10T09:24:19Z | [
"python",
"networking",
"scapy"
] |
Adding Columns if they exist in the Dataframe: pandas | 38,700,848 | <p>I have a Dataframe, where I want to add three columns and make it one, and I want it for the columns which exits in the data frame. so for example, I want to add following columns </p>
<pre><code>List_ID=['ID1','ID2','ID3']
df # Df is the data frame
</code></pre>
<p>I am trying following for summing up the "if e... | 0 | 2016-08-01T14:00:32Z | 38,701,217 | <p>IIUC one possible solution is <a href="http://pandas.pydata.org/pandas-docs/stable/generated/pandas.Series.str.strip.html" rel="nofollow"><code>strip</code></a> wtihespaces:</p>
<pre><code>a=df['Column 1'].str.strip() + df['Column 2'].str.strip()
print (a)
0 A
1 F
2 C
3
dtype: object
</code></pre>
<p... | 2 | 2016-08-01T14:18:35Z | [
"python",
"pandas",
"if-statement",
"for-loop",
"dataframe"
] |
Python - urllib3 get text from docx using tika server | 38,700,924 | <p>I am using <code>python3</code>, <code>urllib3</code> and <code>tika-server-1.13</code> in order to get text from different types of files. This is my python code:</p>
<pre><code>def get_text(self, input_file_path, text_output_path, content_type):
global config
headers = util.make_headers()
mime_type =... | 0 | 2016-08-01T14:04:08Z | 38,719,397 | <p>You're not uploading the data in the same way. <code>--data-binary</code> in curl simply uploads the binary data as it is. No encoding. In urllib3, using <code>fields</code> causes urllib3 to generate a <code>multipart/form-encoded</code> message. On top of that, you're preventing urllib3 from properly setting that ... | 2 | 2016-08-02T11:37:48Z | [
"python",
"python-3.x",
"urllib",
"apache-tika",
"urllib3"
] |
AttributeError: 'Figure' object has no attribute 'plot' | 38,701,137 | <p>My code</p>
<pre><code>import matplotlib.pyplot as plt
plt.style.use("ggplot")
import numpy as np
from mtspec import mtspec
from mtspec.util import _load_mtdata
data = np.loadtxt('262_V01_C00_R000_TEx_BL_4096H.dat')
spec,freq,jackknife,f_statistics,degrees_of_f = mtspec(data=data, delta= 4930.0, time_bandwidth=4 ... | 1 | 2016-08-01T14:15:04Z | 38,701,163 | <p>You assign <code>ax2</code> to a <code>figure</code> object which doesn't have a <code>plot</code> method defined. You want to create your axes using <code>plt.axes</code> instead</p>
<pre><code>ax2 = plt.axes()
# Instead of ax2 = fig
</code></pre>
| 3 | 2016-08-01T14:16:01Z | [
"python",
"matplotlib"
] |
Error: Missing the OpenSSL lib? while trying to install python in pyenv/ SUSE12 environment | 38,701,203 | <p>I have tried installing python in pyenv env, in which i am getting the below error. I have added openssl to the path variable as openssl is already available, still it is throwing the same error. </p>
<p>Also, now tried with a separate user(not root). Same error! And tried to followup the wiki page, but for OpenSUS... | 0 | 2016-08-01T14:18:01Z | 38,701,358 | <p>Python makes use of underlying operating system libraries to support some of its libraries, and it appears you don't have these libraries installed. On Ubuntu you should be able to install them with</p>
<pre><code>$ sudo apt-get install bzip2 libreadline6 libreadline6-dev openssl
</code></pre>
<p>For SUSE 12, as y... | 1 | 2016-08-01T14:26:12Z | [
"python",
"linux",
"opensuse",
"pyenv"
] |
Insert Ordered Dict values while using MySQL INSERT INTO | 38,701,275 | <p>I encounter this error when I'm trying to insert some values into a table.
Here's my code:</p>
<pre><code>def tsx_insert(self, d_list):
for item in d_list:
query = """ INSERT IGNORE INTO tsx_first_insert(protocollo,procedura,oggetto,priorita,
tipo_richiesta,... | -1 | 2016-08-01T14:21:58Z | 38,701,480 | <p>You forgot to mention your <code>params</code> dictionary in your <code>self.cursor.execute()</code> method call, so the parameter strings were left in place rather than substituted.</p>
<p>Try</p>
<pre><code> self.cursor.execute(query, params)
</code></pre>
| 1 | 2016-08-01T14:31:56Z | [
"python",
"mysql",
"mysql-python",
"mysql-error-1064"
] |
Assign into variable value from imported file | 38,701,338 | <p>I'm trying to assign into variable SQL statement from another file which I imported.
Other filename: Table1.py contain variable <code>SQL="Select * from column1"</code>
My current script: </p>
<pre><code>#!/usr/bin/python
datefrom = raw_input("Please enter date from YYYY-MM-DD: ")
dateto = raw_input("Please enter... | 0 | 2016-08-01T14:25:22Z | 38,701,717 | <p>While you are loading modules at runtime you need to store the module object into a variable and then access its variables normally.</p>
<pre><code>table_module = __import__(tablename)
table_sql = table_module.SQL
print table_sql
</code></pre>
<p>Now, if you want to modify the statement, you can just use simple st... | 2 | 2016-08-01T14:41:56Z | [
"python",
"variables",
"import"
] |
A straightforword method to select columns by position | 38,701,400 | <p>I am trying to clarify how can I manage pandas methods to call columns and rows in a Dataframe. An example will clarify my issue</p>
<pre><code>dic = {'a': [1, 5, 2, 7], 'b': [6, 8, 4, 2], 'c': [5, 3, 2, 7]}
df = pd.DataFrame(dic, index = ['e', 'f', 'g', 'h'] )
</code></pre>
<p>than</p>
<pre><code>df =
a b ... | 2 | 2016-08-01T14:28:23Z | 38,701,425 | <p>You can add <code>:</code> because first argument is position of selected indexes and second position of columns in function <a href="http://pandas.pydata.org/pandas-docs/stable/generated/pandas.DataFrame.iloc.html" rel="nofollow"><code>iloc</code></a>:</p>
<p>And <code>:</code> means all indexes in <code>DataFrame... | 1 | 2016-08-01T14:29:33Z | [
"python",
"pandas",
"dataframe"
] |
Resizing Images using Pillow Python | 38,701,452 | <p>Right now I'm trying to resize a few .jpg files and my script is as following:</p>
<pre><code>from PIL import Image
def main( ): #{
filename = "amonstercallsmoviestill.jpg"
image = Image.open(filename)
size = width, height = image.size
image.thumbnail((1600,900))
image.show()
del image... | 0 | 2016-08-01T14:30:39Z | 38,701,832 | <p><code>thumbnail</code> only <em>reduces</em> the size of an image. To make it bigger, use <code>resize</code> instead.</p>
<pre><code>image = image.resize((1600, 900), PIL.Image.LANCZOS)
</code></pre>
| 3 | 2016-08-01T14:46:38Z | [
"python",
"python-imaging-library",
"pillow"
] |
Python Flask SQLAlchemy-Paginator Access next page in html view | 38,701,565 | <p>I have currently a problem to include the pagination function into my project. I know there is <code>LIMIT/OFFSET</code>or <code>yield_per()</code>, but I was not able to implement them.</p>
<p>I am using SQLAlchemy not Flask-SQLAlchemy so <code>paginate</code> wont work.</p>
<p>My Database is not that big. I am t... | 0 | 2016-08-01T14:35:42Z | 38,703,040 | <p>Okay here is a solution (which does not use any further methods from the SQLAlchemy-Paginator package). I coded everything myself, but I would still like to know how it is done with <code>page.next_page_number</code> etc.</p>
<p><strong>Explained:</strong></p>
<p>First of all I added an argument (<code>pagenumber<... | 0 | 2016-08-01T15:46:42Z | [
"python",
"html",
"pagination",
"sqlalchemy"
] |
Create dynamic columns in dataframe using pandas | 38,701,573 | <p>How to create dynamic columns from this pandas dataframe.</p>
<pre><code> Name, Sex
a, M
b, F
c, M
d, F
</code></pre>
<p>Expected dataframe:</p>
<pre><code>Name, M, F
a, 1, 0
b, 0, 1
c, 1, 0
d, 0, 1
</code></pre>
<p>I have tried pandas.pivot() but of no use, could you guys suggest something.</p>
| 0 | 2016-08-01T14:36:02Z | 38,701,630 | <p>Use get dummies:</p>
<pre><code>pd.concat([df['Name'], df['Sex'].str.get_dummies()], axis=1)
Out:
Name F M
0 a 0 1
1 b 1 0
2 c 0 1
3 d 1 0
</code></pre>
<hr>
<p><code>df['Sex'].str.get_dummies()</code> generates the dummies:</p>
<pre><code>df['Sex'].str.get_dummies()
... | 3 | 2016-08-01T14:38:34Z | [
"python",
"pandas"
] |
Create dynamic columns in dataframe using pandas | 38,701,573 | <p>How to create dynamic columns from this pandas dataframe.</p>
<pre><code> Name, Sex
a, M
b, F
c, M
d, F
</code></pre>
<p>Expected dataframe:</p>
<pre><code>Name, M, F
a, 1, 0
b, 0, 1
c, 1, 0
d, 0, 1
</code></pre>
<p>I have tried pandas.pivot() but of no use, could you guys suggest something.</p>
| 0 | 2016-08-01T14:36:02Z | 38,701,681 | <p>You can create a count variable based on the two columns and then do the pivoting, something like:</p>
<pre><code>import pandas as pd
df.groupby(["Name", "Sex"]).size().unstack(level = 1, fill_value = 0)
# Sex F M
#Name
# a 0 1
# b 1 0
# c 0 1
# d 1 0
</code></pre>
<p>Another op... | 1 | 2016-08-01T14:40:18Z | [
"python",
"pandas"
] |
Pandas: Set MultiColumn values based on flat columned value | 38,701,626 | <p>I have a MultiColumned data-frame as follows:</p>
<pre><code>Out[1]:
Empty DataFrame
Columns: [(price, mean), (price, mom_2), (units, mean), (units, mom_2)]
Index: []
</code></pre>
<p>I have some (flat) values for <code>mean</code>, which I would like to put into <code>price</code> and <code>units</code>:</p>
<p... | 1 | 2016-08-01T14:38:26Z | 38,712,030 | <p>You're right, the selection with <code>IndexSlice</code> keeps the levels. I don't know of any neat method here (if at all it exists). </p>
<p>A safe workaround would be to reindex the series:</p>
<pre><code>value.index = pd.MultiIndex.from_product([value.index, ['mean']])
resultsDf.loc[idx] = value
</code></pre>
... | 1 | 2016-08-02T04:55:42Z | [
"python",
"pandas"
] |
Graphviz: vizualize data from a dataframe | 38,701,628 | <p>I have dataframe</p>
<pre><code>ID domain search_term
111 vk.com вконÑакÑе
111 twitter.com ÑÑйÑбÑк
111 facebook.com ÑвиÑÑеÑ
222 avito.ru кÑпиÑÑ Ð¼Ð°ÑинÑ
222 vk.com вконÑакÑе
333 twitter.com ÑвиÑÑеÑ
333 apple.com кÑпиÑÑ Ð°Ð¹Ñон
333 rbk.ru новÐ... | 0 | 2016-08-01T14:38:30Z | 38,717,578 | <p>You create a new graph on each iteration. Take the creation out of the loop and just add the edges inside:</p>
<pre><code>f = Digraph('finite_state_machine', filename='fsm.gv', encoding='utf-8')
f.body.extend(['rankdir=LR', 'size="5,5"'])
f.attr('node', shape='circle')
for i, (id, domain, search_term) in enumerate(... | 0 | 2016-08-02T10:11:06Z | [
"python",
"pandas",
"graphviz"
] |
Cartopy coastlines not showing | 38,701,656 | <p>I just installed Cartopy and is trying their basic example. The code I'm using is </p>
<pre><code>import cartopy.crs as ccrs
import matplotlib.pyplot as plt
ax = plt.axes(projection=ccrs.PlateCarree())
ax.set_global()
ax.coastlines()
plt.show()
</code></pre>
<p>What happens is that no coastlines are drawn, what I ... | 0 | 2016-08-01T14:39:34Z | 38,741,626 | <p>Have you modified any of the matplotlib <a href="http://matplotlib.org/users/customizing.html" rel="nofollow">rc settings</a>? For instance, having <code>'patch.linewidth'</code> set to zero will prevent coastlines from appearing. </p>
| 0 | 2016-08-03T10:57:00Z | [
"python",
"cartopy"
] |
Renaming certain multiple values in a column of dataframe into another single value | 38,701,685 | <p>I have a data Frame, which is 1 GB in size, the following is a dummy one</p>
<pre><code>df <- data.frame(group=rep(c("A", "B", "C","D","E","F","G","H"), each=4),height=sample(100:150, 16))
df
group height
1 A 105
2 A 119
3 B 108
4 B 114
5 C 109
6 C 111
7 D ... | 1 | 2016-08-01T14:40:41Z | 38,701,780 | <p>Pandas/Numpy solution with <a href="http://docs.scipy.org/doc/numpy-1.10.1/reference/generated/numpy.where.html" rel="nofollow"><code>numpy.where</code></a> and boolean mask:</p>
<pre><code>print (df['group'] =='B')
1 False
2 False
3 False
4 False
5 True
6 True
7 True
8 True
9 ... | 1 | 2016-08-01T14:44:17Z | [
"python",
"pandas",
"numpy"
] |
Renaming certain multiple values in a column of dataframe into another single value | 38,701,685 | <p>I have a data Frame, which is 1 GB in size, the following is a dummy one</p>
<pre><code>df <- data.frame(group=rep(c("A", "B", "C","D","E","F","G","H"), each=4),height=sample(100:150, 16))
df
group height
1 A 105
2 A 119
3 B 108
4 B 114
5 C 109
6 C 111
7 D ... | 1 | 2016-08-01T14:40:41Z | 38,701,991 | <p>In R you can try:</p>
<p>Transform to character first and then replace the value directly.</p>
<pre><code>df$group <- as.character(df$group);
df$group[df$group %in% c("B")] <- "NC"
</code></pre>
<p>Edit:</p>
<p>As you updated your question you can try <code>ifelse</code>. Of course you can also overwrite ... | 1 | 2016-08-01T14:54:23Z | [
"python",
"pandas",
"numpy"
] |
Renaming certain multiple values in a column of dataframe into another single value | 38,701,685 | <p>I have a data Frame, which is 1 GB in size, the following is a dummy one</p>
<pre><code>df <- data.frame(group=rep(c("A", "B", "C","D","E","F","G","H"), each=4),height=sample(100:150, 16))
df
group height
1 A 105
2 A 119
3 B 108
4 B 114
5 C 109
6 C 111
7 D ... | 1 | 2016-08-01T14:40:41Z | 38,704,521 | <p>You can also replace the group names as below</p>
<pre><code> df$group=as.character(df$group)
df$group[c(3:4,13:16)]='NC'
df$group[c(1:2)]='PC'
df$group[c(5:12)]='NON'
</code></pre>
| 0 | 2016-08-01T17:14:41Z | [
"python",
"pandas",
"numpy"
] |
Looking for ForeignKey active and add to QuerySet | 38,701,689 | <pre><code>class Control(models.Model):
period = models.DurationField()
active = models.BooleanField()
device_collection = models.ForeignKey(DeviceSet)
class DeviceSet(models.Model):
name = models.CharField()
date_last_control = models.DateField()
def get_next_control(self):
return sel... | 0 | 2016-08-01T14:40:53Z | 38,702,104 | <p>You are getting errors from what you've attempted because <code>annotate</code> method needs an aggregate function (eg <code>Sum</code>, <code>Count</code> etc) rather than a <code>Q</code> object.</p>
<p>Since Django 1.7 it's possible to do what you want using <code>prefetch_related</code>, see docs here:
<a href=... | 0 | 2016-08-01T14:59:29Z | [
"python",
"django",
"annotate"
] |
working with groupby multiple columns in Python | 38,701,792 | <p>I have 3 columns in a dataframe, as:</p>
<p>User_ID, Product_Category_1 and Corresponding Purchase amount.</p>
<p>I am trying to group by based on User_ID and Product_Category_1 and selecting the average of Purchase amount.</p>
<p>So output dataframe will have: User_ID,Product_Category_1 and Avg_Purchase.</p>
<p... | 0 | 2016-08-01T14:45:05Z | 38,701,958 | <p>Ok, This seems to be working:</p>
<pre><code> x = train_bk.groupby(["User_ID","Product_Category_1"],as_index=False)['Purchase'].mean()
</code></pre>
| 0 | 2016-08-01T14:52:29Z | [
"python",
"group-by",
"multiple-columns"
] |
How to learn two sequences simultaenously through LSTM in Tensorflow/TFLearn? | 38,701,848 | <p>I am learning LSTM based seq2seq model in Tensorflow platform. I can very well train a model on a given simple seq2seq examples. </p>
<p>However, in cases where I have to learn two sequences at once from a given sequence (for e.g: learning previous sequence and next sequence from the current sequence simultaneously... | 0 | 2016-08-01T14:47:16Z | 38,729,727 | <p>It seems to me that you want to have a single encoder and multiple decoders (e.g. 2, for 2 output sequences), right? There is <a href="https://github.com/tensorflow/tensorflow/blob/master/tensorflow/python/kernel_tests/seq2seq_test.py#L351" rel="nofollow">one2many</a> in seq2seq for exactly this use-case.</p>
<p>As... | 0 | 2016-08-02T20:19:17Z | [
"python",
"tensorflow",
"deep-learning",
"lstm",
"language-model"
] |
Unknown word/character in txt file from word2vec | 38,701,947 | <p>I recently encountered the <code></s></code> word/character in a vocabulary created by word2vec as a separate word. </p>
<p>Although I did tried to search the web for that character, I cannot actually specify that character at the search engines. </p>
<p>So, does anyone knows what this character is? </p>
| 0 | 2016-08-01T14:52:06Z | 38,715,976 | <p>If you look at the line 82 of <a href="https://code.google.com/archive/p/word2vec/source/default/source" rel="nofollow">source code</a> of <code>word2vec</code>,</p>
<pre><code>if (ch == '\n') {
strcpy(word, (char *)"</s>");
return;
}
</code></pre>
<p><code></s></code> is simply a character used by... | 1 | 2016-08-02T08:57:10Z | [
"python",
"word2vec"
] |
Passing list names as argument to izip | 38,701,952 | <p>I have number of lists that is user defined </p>
<pre><code>numLists = sys.argv[1]
d = [[] for x in xrange(numLists+1)]
</code></pre>
<p>I'm performing some operations on these lists and I want to pass them at the end to <code>itertools.izip</code> in the following format, for example if the user entered numLists ... | 0 | 2016-08-01T14:52:20Z | 38,701,979 | <p><a href="https://docs.python.org/3/tutorial/controlflow.html#unpacking-argument-lists" rel="nofollow"><em>Unpack</em></a> the list of lists into positional arguments of <code>izip()</code>:</p>
<pre><code>for val in itertools.izip(*d):
</code></pre>
| 2 | 2016-08-01T14:53:30Z | [
"python",
"list",
"arguments",
"itertools"
] |
Dynamic spectrum using plotly | 38,701,969 | <p>I want to plot time vs frequency as x and y axis, but also a third parameter that is specified by the intensity of plot at (x, y) rather (time, frequency) point. [Actually, instead of going up with third axis in 3D visualisation, I want something like a 2D plot, with amplitude of third axis governed by the intensity... | 3 | 2016-08-01T14:52:45Z | 38,702,325 | <p>I'd suggest the pcolormesh plot</p>
<pre><code>import matplotlib.pyplot as mp
import numpy as np
# meshgrid your timevector to get it in the desired format
X, Y = np.meshgrid(timevector, range(num_of_frequency_bins))
fig1, ax1 = mp.subplots()
Plothandle = mp.pcolormesh(X, Y, frequencies, cmap=mp.cm.jet, antialia... | 1 | 2016-08-01T15:10:16Z | [
"python",
"plotly"
] |
Django template for loop iteration by distinct foreign key | 38,702,119 | <p>In my app, I have 3 models: Issue, Series, and Character. The Issue model has a Series ForeignKey, and a Character ManyToManyField. Here they are simplified:</p>
<pre><code>class Character(models.Model):
name = models.CharField('Character name', max_length=200)
desc = models.TextField('Description', max_len... | 1 | 2016-08-01T15:00:22Z | 38,703,255 | <p>I would use a function based view rather than a class based generic view. Reason being that your required behavior is going beyond something generic.</p>
<p>In your function you can build the queryset you desire instead of having to fight with the one provided by <code>generic.DetailView</code>.</p>
<pre><code>def... | 1 | 2016-08-01T15:59:23Z | [
"python",
"django",
"for-loop",
"django-templates"
] |
Selecting a subset of a Pandas DataFrame | 38,702,138 | <p>I have the following DateFrame: </p>
<pre><code> record_id month day year plot species sex wgt
33320 33321 1 12 2002 1 DM M 44
33321 33322 1 12 2002 1 DO M 58
... ... ... ... ... ... ... ... ...
</code></pre>
<p>I wa... | 1 | 2016-08-01T15:01:37Z | 38,702,168 | <blockquote>
<p>Is there any way to reduce it to one line?</p>
</blockquote>
<p>You can easily combine the 2 lines into 1:</p>
<pre><code>df_slice = df[df.year == 27].ix[:,'year':]
</code></pre>
| 2 | 2016-08-01T15:03:08Z | [
"python",
"pandas"
] |
Selecting a subset of a Pandas DataFrame | 38,702,138 | <p>I have the following DateFrame: </p>
<pre><code> record_id month day year plot species sex wgt
33320 33321 1 12 2002 1 DM M 44
33321 33322 1 12 2002 1 DO M 58
... ... ... ... ... ... ... ... ...
</code></pre>
<p>I wa... | 1 | 2016-08-01T15:01:37Z | 38,702,190 | <p>You can use <a href="http://pandas.pydata.org/pandas-docs/stable/generated/pandas.DataFrame.ix.html" rel="nofollow"><code>ix</code></a>:</p>
<pre><code>print (df.ix[df.year == 27, 'year':])
</code></pre>
<p>Sample (value <code>2001</code> was added):</p>
<pre><code>print (df)
record id month day year p... | 2 | 2016-08-01T15:04:13Z | [
"python",
"pandas"
] |
Python: Changing value in imported dict has no effect | 38,702,175 | <p>Here's a fun one. Create a file <code>foo.py</code> with the following contents:</p>
<pre><code>OPTIONS = {'x': 0}
def get_option(key):
from foo import OPTIONS
return OPTIONS[key]
if __name__ == '__main__':
OPTIONS['x'] = 1
print("OPTIONS['x'] is %d" % OPTIONS['x'])
print("get_option('x') is %... | 1 | 2016-08-01T15:03:29Z | 38,702,464 | <p>You are getting this because <code>from foo import OPTIONS</code> line in <code>get_options()</code> function loads a new <em>local</em> <strong>OPTIONS</strong> variable in a memory whose value is <em>{'x':0}</em>. But if you remove/comment that line, then you got your expected result, this is because as <strong>OP... | 2 | 2016-08-01T15:17:50Z | [
"python",
"python-2.7",
"python-3.4"
] |
Python the windows cannot find the path specified | 38,702,191 | <p>I am trying to configure my own ninja binary and i get the following error. What is the cause of this?
Running on windows 7 64-bit.</p>
<p><a href="http://i.stack.imgur.com/cKJ5m.png" rel="nofollow"><img src="http://i.stack.imgur.com/cKJ5m.png" alt="Error"></a></p>
| 0 | 2016-08-01T15:04:13Z | 38,783,055 | <p>Via Visual Studio<br></p>
<p>Install Visual Studio (Express is fine), Python for Windows<br><br>
1)In a Visual Studio command prompt: <code>python configure.py --bootstrap</code><br>
2)Open cmd, run vsvarsall.bat from the visual studio folder and after, call <br><code>python configure.py --bootstrap</code></p>
| 0 | 2016-08-05T06:59:42Z | [
"python",
"ninja"
] |
Python Dictionary of DefaultDicts | 38,702,202 | <p>I am trying to build a dictionary containing defaultdicts:</p>
<pre><code>from collections import defaultdict
my_dict = {
'first_key':defaultdict(list)
}
my_dict['first_key'].extend('add this to list')
</code></pre>
<p>...but that returns: <code>AttributeError: 'collections.defaultdict' object has no attribute '... | -2 | 2016-08-01T15:04:50Z | 38,702,294 | <p>Correct me if I'm wrong, but I don't think you want a dictionary of defaultdicts for this. What you're trying to do is easily accomplished using the built-in <code>dict</code> method <a href="https://docs.python.org/2/library/stdtypes.html#dict.setdefault" rel="nofollow"><code>setdefault</code></a>:</p>
<pre><code>... | 2 | 2016-08-01T15:08:44Z | [
"python"
] |
Trying to iterate through a graph breadth first in Python | 38,702,217 | <p>In my code, I am essentially trying to create an implementation of a data flow network. Although the particularities of how I am going about doing this aren't particularly important, I need some help to make the program go through the graph in a breadth first fashion.
When I do this with my code:</p>
<pre><code>def... | 0 | 2016-08-01T15:05:19Z | 38,704,923 | <p>You are mixing BFS (<em>breadth first search</em>) and DFS (<em>depth first search</em>) in your approach.</p>
<p>When sending data in your <code>sand_pile</code> method, you iterate horizontally through all children of the current node, which probably is your approach of implementing a BFS. But as soon as the firs... | 0 | 2016-08-01T17:36:38Z | [
"python",
"data-transfer"
] |
PySpark Hive queries aren't showing output | 38,702,279 | <p>I am able to create, drop, modify tables using pyspark and hivecontext. I load a list with commands I want to send, in string format, and pass them into this function:</p>
<pre><code>def hiveCommands(commands, database):
conf = SparkConf().setAppName(database + 'project').setMaster('local')
sc = SparkContex... | 0 | 2016-08-01T15:08:09Z | 38,706,615 | <p>Call <code>show</code> method to see results:</p>
<pre><code>for command in commands:
df.sql(command).show()
</code></pre>
| 1 | 2016-08-01T19:24:29Z | [
"python",
"apache-spark",
"hive",
"pyspark"
] |
What is the Right Syntax When Using .notnull() in Pandas? | 38,702,332 | <p>I want to use <code>.notnull()</code> on several columns of a dataframe to eliminate the rows which contain "NaN" values. </p>
<p>Let say I have the following <code>df</code>:</p>
<pre><code> A B C
0 1 1 1
1 1 NaN 1
2 1 NaN NaN
3 NaN 1 1
</code></pre>
<p>I tried to use this syntax but it does not ... | 3 | 2016-08-01T15:10:36Z | 38,702,360 | <p>You can first select subset of columns by <code>df[['A','B','C']]</code>, then apply <a href="http://pandas.pydata.org/pandas-docs/stable/generated/pandas.DataFrame.notnull.html" rel="nofollow"><code>notnull</code></a> and specify if <a href="http://pandas.pydata.org/pandas-docs/stable/generated/pandas.DataFrame.all... | 5 | 2016-08-01T15:12:19Z | [
"python",
"pandas",
"dataframe",
null
] |
What is the Right Syntax When Using .notnull() in Pandas? | 38,702,332 | <p>I want to use <code>.notnull()</code> on several columns of a dataframe to eliminate the rows which contain "NaN" values. </p>
<p>Let say I have the following <code>df</code>:</p>
<pre><code> A B C
0 1 1 1
1 1 NaN 1
2 1 NaN NaN
3 NaN 1 1
</code></pre>
<p>I tried to use this syntax but it does not ... | 3 | 2016-08-01T15:10:36Z | 38,702,457 | <p>You can apply multiple conditions by combining them with the <code>&</code> operator (this works not only for the <code>notnull()</code> function).</p>
<pre><code>df[(df.A.notnull() & df.B.notnull() & df.C.notnull())]
A B C
0 1.0 1.0 1.0
</code></pre>
<p>Alternatively, you can just drop a... | 1 | 2016-08-01T15:17:30Z | [
"python",
"pandas",
"dataframe",
null
] |
Error appending to list according to state of bool | 38,702,353 | <p>I am using 2 different libraries and running addresses through them. First i'm using geopy to clean and geocode addresses. Then i'm running the address through pygeocoder to see if the output is a valid address. If the output is valid, i'm appending the address to a list, which I will be returning later. If not, i'm... | 0 | 2016-08-01T15:11:55Z | 38,703,495 | <p>Solved my problem.</p>
<p>I wasn't giving pygeocoder enough information. My address was in the format of street number street name. By appending the city to the end of the address and THEN validating it I solved the problem.</p>
<p>Unfortunately, pygeocoder works through Google Maps, which has a relatively low req... | 0 | 2016-08-01T16:12:53Z | [
"python",
"geopy"
] |
Am I using python's apply_async correctly? | 38,702,364 | <p>This is my first time trying to use multiprocessing in Python. I'm trying to parallelize my function <code>fun</code> over my dataframe <code>df</code> by row. The callback function is just to append results to an empty list that I'll sort through later. </p>
<p>Is this the correct way to use <code>apply_async</cod... | 0 | 2016-08-01T15:12:28Z | 38,702,678 | <p>It looks like using <a href="https://docs.python.org/2/library/multiprocessing.html#multiprocessing.pool.multiprocessing.Pool.map" rel="nofollow">map</a> or <a href="https://docs.python.org/2/library/multiprocessing.html#multiprocessing.pool.multiprocessing.Pool.imap_unordered" rel="nofollow">imap_unordered</a> (dep... | 1 | 2016-08-01T15:29:03Z | [
"python",
"python-2.7",
"multiprocessing",
"python-multiprocessing"
] |
ValueError when trying to convert strings to floating point | 38,702,382 | <p>I'm having troubles running this program.<br>
It tells me I have a</p>
<blockquote>
<p>ValueError: could not convert string to float</p>
</blockquote>
<p>The problem is though, that it just skips my input commands and jumps to </p>
<pre><code>print("Invalid Response")
</code></pre>
<p>This program works fine o... | 0 | 2016-08-01T15:13:26Z | 38,713,873 | <p>This is the desired code. I changed a little bit some indentations are wrong in case of contin() function and some logic. Please refer to this if I am wrong in some place do tell me. Thank you</p>
<pre><code>def calc(num1,chars,num2): #The function performing calculation.
if chars == "+":
result... | 0 | 2016-08-02T07:09:26Z | [
"python"
] |
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