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 |
|---|---|---|---|---|---|---|---|---|---|
Script execution time on different computers (python 3.5, miniconda) | 38,737,144 | <p>I was faced with the following problem: on a computer (number 2) script execution time is significantly greater than on another computer (computer 1).</p>
<ul>
<li>Computer 1 - i3 - 4170 CPU @ 3.7 GHz (4 core), 4GB RAM (Execution time 9.5 minutes)</li>
<li>Computer 2 - i7 - 3.07GHz (8 core), 8GB RAM (Execution time... | 0 | 2016-08-03T07:31:21Z | 38,737,237 | <p>It runs on single core, the computer1 has higher clock rate = faster single threaded processing.</p>
| 1 | 2016-08-03T07:35:15Z | [
"python",
"excel",
"python-3.5",
"execution-time",
"miniconda"
] |
Script execution time on different computers (python 3.5, miniconda) | 38,737,144 | <p>I was faced with the following problem: on a computer (number 2) script execution time is significantly greater than on another computer (computer 1).</p>
<ul>
<li>Computer 1 - i3 - 4170 CPU @ 3.7 GHz (4 core), 4GB RAM (Execution time 9.5 minutes)</li>
<li>Computer 2 - i7 - 3.07GHz (8 core), 8GB RAM (Execution time... | 0 | 2016-08-03T07:31:21Z | 38,737,662 | <p>As explained in a comment, Python uses the <a href="https://en.wikipedia.org/wiki/Global_interpreter_lock" rel="nofollow">Global Interpreter Lock (GIL)</a>. As stated on the Wiki: "An interpreter that uses GIL always allows <strong>exactly one thread</strong> to execute at a time, <strong>even if run on a multi-core... | 0 | 2016-08-03T07:57:08Z | [
"python",
"excel",
"python-3.5",
"execution-time",
"miniconda"
] |
Extracting key value pairs from string with quotes | 38,737,250 | <p>I am having trouble coding an 'elegant' parser for this requirement. (One that does not look like a piece of C breakfast). The input is a string, key value pairs separated by ',' and joined '='.</p>
<pre><code>key1=value1,key2=value2
</code></pre>
<p>The part tricking me is values can be quoted (") , and inside th... | 3 | 2016-08-03T07:35:59Z | 38,738,277 | <p>I'm not sure that it does not look like piece of C breakfast and that it is quite elegant :)</p>
<pre><code>data = {}
original = 'key1=value1,key2="value2,still_value2"'
converted = ''
is_open = False
for c in original:
if c == ',' and not is_open:
c = '\n'
elif c in ('"',"'"):
is_open = no... | 2 | 2016-08-03T08:25:58Z | [
"python",
"parsing"
] |
Extracting key value pairs from string with quotes | 38,737,250 | <p>I am having trouble coding an 'elegant' parser for this requirement. (One that does not look like a piece of C breakfast). The input is a string, key value pairs separated by ',' and joined '='.</p>
<pre><code>key1=value1,key2=value2
</code></pre>
<p>The part tricking me is values can be quoted (") , and inside th... | 3 | 2016-08-03T07:35:59Z | 38,738,409 | <p>Using some regex magic from <a href="http://stackoverflow.com/questions/16710076/python-split-a-string-respect-and-preserve-quotes">Split a string, respect and preserve quotes</a>, we can do:</p>
<pre><code>import re
string = 'key1=value1,key2="value2,still_value2"'
key_value_pairs = re.findall(r'(?:[^\s,"]|"(?:\... | 5 | 2016-08-03T08:32:07Z | [
"python",
"parsing"
] |
Extracting key value pairs from string with quotes | 38,737,250 | <p>I am having trouble coding an 'elegant' parser for this requirement. (One that does not look like a piece of C breakfast). The input is a string, key value pairs separated by ',' and joined '='.</p>
<pre><code>key1=value1,key2=value2
</code></pre>
<p>The part tricking me is values can be quoted (") , and inside th... | 3 | 2016-08-03T07:35:59Z | 38,738,508 | <p>I came up with this regular expression solution:</p>
<pre><code>import re
match = re.findall(r'([^=]+)=(("[^"]+")|([^,]+)),?', 'key1=value1,key2=value2,key3="value3,stillvalue3",key4=value4')
</code></pre>
<p>And this makes "match":</p>
<pre><code>[('key1', 'value1', '', 'value1'), ('key2', 'value2', '', 'value2'... | 3 | 2016-08-03T08:37:03Z | [
"python",
"parsing"
] |
Extracting key value pairs from string with quotes | 38,737,250 | <p>I am having trouble coding an 'elegant' parser for this requirement. (One that does not look like a piece of C breakfast). The input is a string, key value pairs separated by ',' and joined '='.</p>
<pre><code>key1=value1,key2=value2
</code></pre>
<p>The part tricking me is values can be quoted (") , and inside th... | 3 | 2016-08-03T07:35:59Z | 38,738,754 | <p>Based on several other answers, I came up with the following solution:</p>
<pre><code>import re
import itertools
data = 'key1=value1,key2="value2,still_value2"'
# Based on Alan Moore's answer on http://stackoverflow.com/questions/2785755/how-to-split-but-ignore-separators-in-quoted-strings-in-python
def split_on_... | 1 | 2016-08-03T08:48:45Z | [
"python",
"parsing"
] |
Extracting key value pairs from string with quotes | 38,737,250 | <p>I am having trouble coding an 'elegant' parser for this requirement. (One that does not look like a piece of C breakfast). The input is a string, key value pairs separated by ',' and joined '='.</p>
<pre><code>key1=value1,key2=value2
</code></pre>
<p>The part tricking me is values can be quoted (") , and inside th... | 3 | 2016-08-03T07:35:59Z | 38,738,997 | <p>I would advise against using regular expressions for this task, because the language you want to parse is not regular.</p>
<p>You have a character string of multiple key value pairs. The best way to parse this is not to match patterns on it, but to properly tokenize it.</p>
<p>There is a module in the Python stand... | 2 | 2016-08-03T09:00:01Z | [
"python",
"parsing"
] |
Redis - Pyredis iterating through results from SINTER on SET | 38,737,271 | <p>I have 2 SET structures with the following values added:</p>
<pre><code>r.sadd("clONE", 'abc')
r.sadd("clONE", 'def')
r.sadd("clONE", 'ghi')
r.sadd("TWO", 'abc')
r.sadd("TWO", 'def')
print(r.sinter("clONE", "TWO"))
OUTPUT: set(['abc', 'def'])
</code></pre>
<p>How do I get the value 'abc' and the 'def' out of th... | 0 | 2016-08-03T07:37:01Z | 38,738,248 | <p>sets are not indexed. The order depends on the internal hash.
Never rely on the order in a set, even if it appears logical.</p>
<p>You can do the following:</p>
<pre><code>s = r.sinter("clONE", "TWO")
# iterate through the set, unsorted
for i in s:
print(i)
</code></pre>
<p>or</p>
<pre><code>l = sorted(s) ... | 1 | 2016-08-03T08:24:21Z | [
"python",
"redis"
] |
How can I use global variable in python class? | 38,737,314 | <p>the Java code runs, while python code not, why?
How can I access global variable inside class in Python?</p>
<p><strong>Python code:</strong></p>
<pre><code>Definition for a binary tree node.
class TreeNode(object):
def __init__(self, x):
self.val = x
self.left = None
... | 1 | 2016-08-03T07:39:06Z | 38,737,429 | <p>Try this instead: </p>
<pre><code> class Solution(object):
previous = None
def isValidBST(self, root):
"""
:type root: TreeNode
:rtype: bool
"""
if not root:
return True
if not self.isValidBST(root.left):
... | 0 | 2016-08-03T07:45:34Z | [
"java",
"python"
] |
How can I use global variable in python class? | 38,737,314 | <p>the Java code runs, while python code not, why?
How can I access global variable inside class in Python?</p>
<p><strong>Python code:</strong></p>
<pre><code>Definition for a binary tree node.
class TreeNode(object):
def __init__(self, x):
self.val = x
self.left = None
... | 1 | 2016-08-03T07:39:06Z | 38,738,029 | <p>You should simply use global keyword.
As previous = None is defined outside class Solution, so to use same variable inside class, add a line.</p>
<pre><code>global previous
if previous!=None and previous >= root.val:
your logic
</code></pre>
<p>this will do your work. </p>
| 0 | 2016-08-03T08:13:15Z | [
"java",
"python"
] |
replacing the values in a numpy array with the values of another array against value of one array as index in another | 38,737,403 | <p>I want to change the values in a numpy <strong>array(x)</strong> corresponding to the value in numpy <strong>array(y)</strong> at <code>index = x[index]</code></p>
<p>A numpy array <code>x = [1,2,3,4,0,1,2,3]</code>
another Numpy Array <code>y = [3,4,0,1,2]</code></p>
<pre><code>for i in range(len(x)):
x[i] = ... | 0 | 2016-08-03T07:43:49Z | 38,737,460 | <p>Use:</p>
<pre><code>x = y[x]
</code></pre>
<p>Example:</p>
<pre><code>>>> import numpy as np
>>> x = np.array( [1,2,3,4,0,1,2,3] )
>>> y = np.array( [3,4,0,1,2] )
>>> y[x]
array([4, 0, 1, 2, 3, 4, 0, 1])
</code></pre>
<p>Or, to demonstrate assignment:</p>
<pre><code>>>&... | 0 | 2016-08-03T07:47:21Z | [
"python",
"numpy"
] |
how ctypes bitfields really work? | 38,737,497 | <p>In python, using ctypes, following is legal:</p>
<pre><code>from ctypes import *
class POINT(Structure):
_fields_ = [("x", c_int),
("y", c_int)]
p = POINT(10,20)
sum = p.x + p.y
</code></pre>
<p>But how this works? I mean how p.x is perfectly legal? What kind of trick provides this?
thanks.</p>
| 0 | 2016-08-03T07:48:50Z | 38,738,032 | <p>When you initialize an instance of a subclass the <code>Structure</code> class it reads the <code>_fields_</code> and associates attributes based on the field names in that list. </p>
<p>This is all done in C, so if you want to see exactly how it is done you need to use the source, in particular the definition of t... | 2 | 2016-08-03T08:13:17Z | [
"python",
"bit-fields"
] |
what is the difference in ways setting indexes | 38,737,528 | <p>What is the difference between how I set index of the data frame?</p>
<pre><code>data = [['A', 5], ['B', 6], ['C', 7]]
df = pd.DataFrame(data=data, columns=['key', 'amount'], index= ['key'])
</code></pre>
<p>I get following error:</p>
<pre><code>Shape of passed values is (2, 3), indices imply (2, 1)
</code></pre>... | 2 | 2016-08-03T07:50:29Z | 38,737,661 | <p>In the first way:</p>
<pre><code>data = [['A', 5], ['B', 6], ['C', 7]]
df = pd.DataFrame(data=data, columns=['key', 'amount'], index= ['key'])
</code></pre>
<p>You are specifying the index to be a single value of <code>'key'</code>. Said another way, there will be a single row whose label is <code>'key'</code>.</... | 2 | 2016-08-03T07:57:03Z | [
"python",
"pandas",
"dataframe"
] |
what is the difference in ways setting indexes | 38,737,528 | <p>What is the difference between how I set index of the data frame?</p>
<pre><code>data = [['A', 5], ['B', 6], ['C', 7]]
df = pd.DataFrame(data=data, columns=['key', 'amount'], index= ['key'])
</code></pre>
<p>I get following error:</p>
<pre><code>Shape of passed values is (2, 3), indices imply (2, 1)
</code></pre>... | 2 | 2016-08-03T07:50:29Z | 38,737,690 | <p>On the one hand, <a href="http://pandas.pydata.org/pandas-docs/stable/generated/pandas.DataFrame.html" rel="nofollow"><code>pd.Dataframe</code></a> expects index to be an array, and will be used as index for the rows, for example :</p>
<pre><code>In [17]: data
Out[17]: [['A', 5], ['B', 6], ['C', 7]]
In [18]: df = ... | 2 | 2016-08-03T07:58:35Z | [
"python",
"pandas",
"dataframe"
] |
Sorting words in query in alphabetical order and remove duplicate words from individual rows | 38,737,561 | <p>I want to sort the words of a given query from each row of Pandas DataFrame and then remove duplicates from them. How can I perform this task on each row separately like :
Given DataFrame :</p>
<pre><code>Sr.No | Query
-------------
1. war gears of war
2. call of duty
3. legend of troy legend
4. reside... | 1 | 2016-08-03T07:51:57Z | 38,737,751 | <p>You can first create <code>Series</code> with <a href="http://pandas.pydata.org/pandas-docs/stable/generated/pandas.Series.str.split.html" rel="nofollow"><code>split</code></a> and <a href="http://pandas.pydata.org/pandas-docs/stable/generated/pandas.DataFrame.stack.html" rel="nofollow"><code>stack</code></a>:</p>
... | 1 | 2016-08-03T08:00:57Z | [
"python",
"pandas"
] |
Sorting words in query in alphabetical order and remove duplicate words from individual rows | 38,737,561 | <p>I want to sort the words of a given query from each row of Pandas DataFrame and then remove duplicates from them. How can I perform this task on each row separately like :
Given DataFrame :</p>
<pre><code>Sr.No | Query
-------------
1. war gears of war
2. call of duty
3. legend of troy legend
4. reside... | 1 | 2016-08-03T07:51:57Z | 38,737,858 | <h3>Setup</h3>
<pre><code>df = pd.DataFrame([
['war gears of war'],
['call of duty'],
['legend of troy legend'],
['resident evil'],
], pd.Index(['1.', '2.', '3.', '4.'], name='Sr.No'), ['Query'])
df
</code></pre>
<p><a href="http://i.stack.imgur.com/bh9IF.png" rel="nofollow"><im... | 3 | 2016-08-03T08:05:42Z | [
"python",
"pandas"
] |
Import set of builtin functions from a python file to another python file | 38,737,599 | <p>I have set of inbuilt functions in 'pythonfile1.py' located at '/Users/testuser/Documents', the file contains</p>
<pre><code>import os
import sys
import time
</code></pre>
<p>Now i want to import 'pythonfile1.py' to 'pythonfile2.py', which is located at '/Users/testuser/Documents/execute'
I have tried with my foll... | 1 | 2016-08-03T07:53:51Z | 38,737,730 | <p>if you want to import stuff from another file, you should use python modules.</p>
<p>If you will create file named <strong>init</strong>.py then the execute folder becomes a module.
After that you can use</p>
<pre><code>from .pythonfile1 import function_name
</code></pre>
<p>or you can use</p>
<pre><code>from .p... | 0 | 2016-08-03T08:00:06Z | [
"python",
"file"
] |
Import set of builtin functions from a python file to another python file | 38,737,599 | <p>I have set of inbuilt functions in 'pythonfile1.py' located at '/Users/testuser/Documents', the file contains</p>
<pre><code>import os
import sys
import time
</code></pre>
<p>Now i want to import 'pythonfile1.py' to 'pythonfile2.py', which is located at '/Users/testuser/Documents/execute'
I have tried with my foll... | 1 | 2016-08-03T07:53:51Z | 38,739,470 | <p>Your question is a bit unclear. Basically, there are two things 'wrong'. </p>
<ul>
<li><p>First, your import statement is broken:</p>
<pre><code>import pythonfile1.py
</code></pre>
<p>This specifies a <strong>file</strong> name, not a <strong>module</strong> name - modules don't contain dots and extensions. This ... | 1 | 2016-08-03T09:20:15Z | [
"python",
"file"
] |
The best way to check if all elements of a list matches a condition in for loop? | 38,737,872 | <p>My question is quite similar to <a href="http://stackoverflow.com/questions/10666163/how-to-check-if-all-elements-of-a-list-matches-a-condition">How to check if all elements of a list matches a condition</a>.
But I couldn't find a right way to do the same thing in a for loop.
For example, using all in python is like... | -3 | 2016-08-03T08:06:21Z | 38,737,942 | <p>Here: </p>
<pre><code>items = [[1, 2, 0], [1, 0, 1], [1, 2, 0]]
def check_list(items):
for item in items:
if item[2] != 0:
return False
return True
print(check_list(items))
</code></pre>
<p>If you want to make it a bit more generic:</p>
<pre><code>def my_all(enumerable, condition)... | 1 | 2016-08-03T08:10:00Z | [
"python",
"list",
"for-loop"
] |
The best way to check if all elements of a list matches a condition in for loop? | 38,737,872 | <p>My question is quite similar to <a href="http://stackoverflow.com/questions/10666163/how-to-check-if-all-elements-of-a-list-matches-a-condition">How to check if all elements of a list matches a condition</a>.
But I couldn't find a right way to do the same thing in a for loop.
For example, using all in python is like... | -3 | 2016-08-03T08:06:21Z | 38,737,947 | <p>Try This:-</p>
<pre><code>prinBool = True
for item in items:
if item[2] != 0:
prinBool = False
break
print prinBool
</code></pre>
| 0 | 2016-08-03T08:10:11Z | [
"python",
"list",
"for-loop"
] |
The best way to check if all elements of a list matches a condition in for loop? | 38,737,872 | <p>My question is quite similar to <a href="http://stackoverflow.com/questions/10666163/how-to-check-if-all-elements-of-a-list-matches-a-condition">How to check if all elements of a list matches a condition</a>.
But I couldn't find a right way to do the same thing in a for loop.
For example, using all in python is like... | -3 | 2016-08-03T08:06:21Z | 38,737,985 | <p>You could use a <code>for</code> loop with the <code>else</code> clause:</p>
<pre><code>for item in items:
if item[2] != 0:
print False
break
else:
print True
</code></pre>
<p>The statements after <code>else</code> are executed when the items of a sequence are exhausted, i.e. when the loop wa... | 0 | 2016-08-03T08:11:40Z | [
"python",
"list",
"for-loop"
] |
The best way to check if all elements of a list matches a condition in for loop? | 38,737,872 | <p>My question is quite similar to <a href="http://stackoverflow.com/questions/10666163/how-to-check-if-all-elements-of-a-list-matches-a-condition">How to check if all elements of a list matches a condition</a>.
But I couldn't find a right way to do the same thing in a for loop.
For example, using all in python is like... | -3 | 2016-08-03T08:06:21Z | 38,738,199 | <p>Do you mean something like this?</p>
<pre><code>for item in items:
for x in range (0,3):
if item[x] == 0:
print "True"
</code></pre>
| -1 | 2016-08-03T08:21:27Z | [
"python",
"list",
"for-loop"
] |
The best way to check if all elements of a list matches a condition in for loop? | 38,737,872 | <p>My question is quite similar to <a href="http://stackoverflow.com/questions/10666163/how-to-check-if-all-elements-of-a-list-matches-a-condition">How to check if all elements of a list matches a condition</a>.
But I couldn't find a right way to do the same thing in a for loop.
For example, using all in python is like... | -3 | 2016-08-03T08:06:21Z | 38,738,231 | <p>With <code>functools</code>, it will be easier : </p>
<pre><code>from functools import reduce
items = [[1, 2, 0], [1, 0, 1], [1, 2, 0]]
f = lambda y,x : y and x[2] == 0
reduce(f,items)
</code></pre>
| 0 | 2016-08-03T08:23:19Z | [
"python",
"list",
"for-loop"
] |
The best way to check if all elements of a list matches a condition in for loop? | 38,737,872 | <p>My question is quite similar to <a href="http://stackoverflow.com/questions/10666163/how-to-check-if-all-elements-of-a-list-matches-a-condition">How to check if all elements of a list matches a condition</a>.
But I couldn't find a right way to do the same thing in a for loop.
For example, using all in python is like... | -3 | 2016-08-03T08:06:21Z | 38,738,276 | <p>If you want to have an <code>if</code> and an <code>else</code>, you can still use the <code>any</code> method:</p>
<pre><code>if any(item[2] == 0 for item in items):
print('There is an item with item[2] == 0')
else:
print('There is no item with item[2] == 0')
</code></pre>
<p>The <code>any</code> comes fr... | 1 | 2016-08-03T08:25:58Z | [
"python",
"list",
"for-loop"
] |
TypeError: list indices must be integers, not str (boolean convertion actually) | 38,737,955 | <pre><code>import nltk
import random
from nltk.corpus import movie_reviews
documents=[(list(movie_reviews.words(fileid)),category)
for category in movie_reviews.categories()
for fileid in movie_reviews.fileids(category)]
random.shuffle(documents)
#print(documents[1])
all_words=[]
for w in movi... | 1 | 2016-08-03T08:10:31Z | 38,738,209 | <p><code>features</code> must be initialized to a <code>dict</code> rather than a <code>list</code>. </p>
<p>The error was because <code>word_features</code> is a list of <em>strings</em> which you were trying to index using a list and lists can't have string indices.</p>
<pre><code>features={}
for w in word_features... | 2 | 2016-08-03T08:21:58Z | [
"python",
"find",
"movie",
"review"
] |
TypeError: list indices must be integers, not str (boolean convertion actually) | 38,737,955 | <pre><code>import nltk
import random
from nltk.corpus import movie_reviews
documents=[(list(movie_reviews.words(fileid)),category)
for category in movie_reviews.categories()
for fileid in movie_reviews.fileids(category)]
random.shuffle(documents)
#print(documents[1])
all_words=[]
for w in movi... | 1 | 2016-08-03T08:10:31Z | 38,738,263 | <p>You have tried to index a list <code>features</code> with a string and it is not possible with python. <strong>List indices can only be integers</strong>. What you need is a <code>dictionary</code>. </p>
<p>Try using a <code>defaultdict</code> meaning that even if a key is not found in the dictionary, instead of a ... | 3 | 2016-08-03T08:25:26Z | [
"python",
"find",
"movie",
"review"
] |
Most reliable way to automatically choose line styles in matplotlib in combination with seaborn | 38,738,019 | <p>I'm looking for a reliable way to automatically choose line styles for my plots. Right now I have 8 lines for a plot and I hope it is feasible to automatically choose line styles that are distinguishable from each other. </p>
<p>As of now, I have basically two ways. Setting markers or defining styles. Both seem to ... | 6 | 2016-08-03T08:13:01Z | 39,107,966 | <p>If you want to keep the rcParams that you have in matplotlib and are using the latest version of seaborn (>= 0.7.1), the easiest way is to use <code>import seaborn.apionly</code> as explained in <a href="https://stanford.edu/~mwaskom/software/seaborn/whatsnew.html" rel="nofollow">what's new</a></p>
| 0 | 2016-08-23T18:05:43Z | [
"python",
"matplotlib",
"seaborn"
] |
Where to activate my proxy setting in my django app | 38,738,151 | <p>I am trying send an activation mail to the users in my django app. I am developing in my company and it has proxy. So, when i try to send email to the user, it gives connection timeout error. But when i try it in my home it works perfectly. I have got the proxy settings from my company but I am confused where to upd... | 0 | 2016-08-03T08:18:51Z | 38,739,319 | <p>Looks like you want to use HTTP proxy to access external SMTP server.
It is feasible if your proxy server supports Socks or CONNECT methods.
Consider using this libraries to wrap your smtp-related code:</p>
<ol>
<li><a href="http://socksipy.sourceforge.net/" rel="nofollow">http://socksipy.sourceforge.net/</a></li>
... | 1 | 2016-08-03T09:14:22Z | [
"python",
"django",
"proxy"
] |
Python enumerate reverse index only | 38,738,548 | <p>I am trying to reverse the index given by <code>enumerate</code> whilst retaining the original order of the list being enumerated.</p>
<p>Assume I have the following:</p>
<pre><code>>> range(5)
[0, 1, 2, 3, 4]
</code></pre>
<p>If I enumerate this I would get the following:</p>
<pre><code>>> list(enum... | 5 | 2016-08-03T08:38:41Z | 38,738,634 | <p>Just take the length of your list and subtract the index from that...</p>
<pre><code>L = range(5)
for i, n in L:
my_i = len(L) -1 - i
...
</code></pre>
<p>Or if you really need a generator:</p>
<pre><code>def reverse_enumerate(L):
# Only works on things that have a len()
l = len(L)
for i, n in e... | 1 | 2016-08-03T08:42:35Z | [
"python",
"python-3.x",
"reverse",
"enumerate"
] |
Python enumerate reverse index only | 38,738,548 | <p>I am trying to reverse the index given by <code>enumerate</code> whilst retaining the original order of the list being enumerated.</p>
<p>Assume I have the following:</p>
<pre><code>>> range(5)
[0, 1, 2, 3, 4]
</code></pre>
<p>If I enumerate this I would get the following:</p>
<pre><code>>> list(enum... | 5 | 2016-08-03T08:38:41Z | 38,738,652 | <p>How about using zip instead with a reversed range?</p>
<pre><code>>>> zip(range(9, -1, -1), range(10))
[(9, 0), (8, 1), (7, 2), (6, 3), (5, 4), (4, 5), (3, 6), (2, 7), (1, 8), (0, 9)]
>>> def reversedEnumerate(l):
return zip(range(len(l)-1, -1, -1), l)
>>> reversedEnumerate(rang... | 8 | 2016-08-03T08:43:26Z | [
"python",
"python-3.x",
"reverse",
"enumerate"
] |
Python enumerate reverse index only | 38,738,548 | <p>I am trying to reverse the index given by <code>enumerate</code> whilst retaining the original order of the list being enumerated.</p>
<p>Assume I have the following:</p>
<pre><code>>> range(5)
[0, 1, 2, 3, 4]
</code></pre>
<p>If I enumerate this I would get the following:</p>
<pre><code>>> list(enum... | 5 | 2016-08-03T08:38:41Z | 38,738,731 | <p>I don't know if this solution is better for you, but at least it's shorter:</p>
<pre><code>>>> [(4 - x, x) for x in range(5)]
[(4, 0), (3, 1), (2, 2), (1, 3), (0, 4)]
</code></pre>
| 3 | 2016-08-03T08:47:57Z | [
"python",
"python-3.x",
"reverse",
"enumerate"
] |
Python enumerate reverse index only | 38,738,548 | <p>I am trying to reverse the index given by <code>enumerate</code> whilst retaining the original order of the list being enumerated.</p>
<p>Assume I have the following:</p>
<pre><code>>> range(5)
[0, 1, 2, 3, 4]
</code></pre>
<p>If I enumerate this I would get the following:</p>
<pre><code>>> list(enum... | 5 | 2016-08-03T08:38:41Z | 38,738,806 | <p>Assuming your list is not long and you will not run into performance errors, you may use <code>list(enumerate(range(5)[::-1]))[::-1]</code>.</p>
<p>Test:</p>
<p><code>>>> list(enumerate(range(5)[::-1]))[::-1]
[(0, 4), (1, 3), (2, 2), (3, 1), (4, 0)]</code></p>
| 1 | 2016-08-03T08:50:55Z | [
"python",
"python-3.x",
"reverse",
"enumerate"
] |
Python enumerate reverse index only | 38,738,548 | <p>I am trying to reverse the index given by <code>enumerate</code> whilst retaining the original order of the list being enumerated.</p>
<p>Assume I have the following:</p>
<pre><code>>> range(5)
[0, 1, 2, 3, 4]
</code></pre>
<p>If I enumerate this I would get the following:</p>
<pre><code>>> list(enum... | 5 | 2016-08-03T08:38:41Z | 38,738,812 | <p>Actually I'm using the same logic as @RemcoGerlich did, but I use <code>list comprehension</code> directly, which make the code now become 1-liner:</p>
<pre><code>def generatelist(x):
return [(x-1-i,n) for i,n in enumerate(range(x))]
</code></pre>
<p>Regarding the dilemma of choosing <code>generator</code> or ... | 2 | 2016-08-03T08:51:15Z | [
"python",
"python-3.x",
"reverse",
"enumerate"
] |
Python enumerate reverse index only | 38,738,548 | <p>I am trying to reverse the index given by <code>enumerate</code> whilst retaining the original order of the list being enumerated.</p>
<p>Assume I have the following:</p>
<pre><code>>> range(5)
[0, 1, 2, 3, 4]
</code></pre>
<p>If I enumerate this I would get the following:</p>
<pre><code>>> list(enum... | 5 | 2016-08-03T08:38:41Z | 38,738,832 | <p>If you're going to re-use it several times, you can make your own generator:</p>
<pre><code>def reverse_enum(lst):
for j, item in enumerate(lst):
yield len(lst)-1-j, item
print list(reverse_enum(range(5)))
# [(4, 0), (3, 1), (2, 2), (1, 3), (0, 4)]
</code></pre>
<p>or</p>
<pre><code>def reverse_enum(... | 0 | 2016-08-03T08:52:21Z | [
"python",
"python-3.x",
"reverse",
"enumerate"
] |
Stream a huge Excel file, creating it on the fly? | 38,738,655 | <p>I'm writing a web application that might sometimes output dozens of thousands of rows (or even more) in an Excel file. openpyxl was chosen for Excel output preparation, but I'm not sure if I could read the data from the database and output it at the same time. Is there a way to do that? Here's an example of what I m... | 2 | 2016-08-03T08:43:33Z | 38,739,666 | <p>openpyxl already provides a <code>write-only</code> mode designed for streaming use. However, as all XSLX files are actually zip files and, as the zip format does not allow streaming, it is not possible to stream XLSX files while they are being written.</p>
| 1 | 2016-08-03T09:29:31Z | [
"python",
"excel",
"streaming",
"bigdata",
"openpyxl"
] |
How to drawing shapes using XLSXWriter | 38,738,706 | <p>I wana draw some simple shapes in excel file like as "arrow, line, rectangle, oval" using XLSXWriter, but i can find any example to do it. Is it possible ? If not, what library of python can do that ?
Thanks!</p>
| 2 | 2016-08-03T08:46:35Z | 38,740,317 | <blockquote>
<p>is it possible?</p>
</blockquote>
<p>Unfortunately not. Shapes aren't supported in XlsxWriter, apart from Textbox. </p>
| 0 | 2016-08-03T09:58:36Z | [
"python",
"xlsxwriter"
] |
Insert a value in json file with python | 38,738,717 | <p>For a project, I need to use json for store some values :</p>
<pre><code>{
"Serial_011": "011",
"Servers_011":
[
{
"hostname": "srv-a.11",
"ipv4_address": "0.0.0.0",
"services":
[
{
"uri": "http://www.google.... | 0 | 2016-08-03T08:46:54Z | 38,739,072 | <p>You're appending a string value instead of the dictionary. Instead of:</p>
<pre><code>dic['Servers_011'][0]['services'].append('{"uri":"http://www.google.com", "expected_code": 200}')
</code></pre>
<p>Do</p>
<pre><code>dic['Servers_011'][0]['services'].append({"uri":"http://www.google.com", "expected_code": 200})... | 0 | 2016-08-03T09:02:53Z | [
"python",
"json"
] |
Insert a value in json file with python | 38,738,717 | <p>For a project, I need to use json for store some values :</p>
<pre><code>{
"Serial_011": "011",
"Servers_011":
[
{
"hostname": "srv-a.11",
"ipv4_address": "0.0.0.0",
"services":
[
{
"uri": "http://www.google.... | 0 | 2016-08-03T08:46:54Z | 38,739,127 | <pre><code>with open('test.json', 'r') as f:
dic = json.load(f)
dic['Servers_011'][0]['services'].append({"uri": "http://www.google.com", "expected_code": 200})
with open('test.json', 'w') as f:
json.dump(dic, f)
</code></pre>
| 0 | 2016-08-03T09:06:10Z | [
"python",
"json"
] |
Insert a value in json file with python | 38,738,717 | <p>For a project, I need to use json for store some values :</p>
<pre><code>{
"Serial_011": "011",
"Servers_011":
[
{
"hostname": "srv-a.11",
"ipv4_address": "0.0.0.0",
"services":
[
{
"uri": "http://www.google.... | 0 | 2016-08-03T08:46:54Z | 38,739,510 | <p>You are doing the correct thing.But problem was like passing as a string.A small change is needed.Just remove the single quote while passing the structure.
Ultimately you want in the form of dict but you are passing as a string. That's obviously not possible.Please see the below to :</p>
<pre><code>with open('Examp... | 0 | 2016-08-03T09:21:53Z | [
"python",
"json"
] |
Generating gray codes. | 38,738,835 | <p>I tried generating gray codes in <em>Python</em>. This code works correctly. The issue is that I am initialising the base case (<code>n=1,[0,1]</code>) in the <code>main</code> function and passing it to <code>gray_code</code> function to compute the rest. I want to generate all the gray codes inside the function it... | 0 | 2016-08-03T08:52:31Z | 38,739,120 | <pre><code>def gray_code(n):
def gray_code_recurse (g,n):
k=len(g)
if n<=0:
return
else:
for i in range (k-1,-1,-1):
char='1'+g[i]
g.append(char)
for i in range (k-1,-1,-1):
g[i]='0'+g[i]
gra... | 1 | 2016-08-03T09:05:45Z | [
"python",
"algorithm",
"recursion",
"gray-code"
] |
Generating gray codes. | 38,738,835 | <p>I tried generating gray codes in <em>Python</em>. This code works correctly. The issue is that I am initialising the base case (<code>n=1,[0,1]</code>) in the <code>main</code> function and passing it to <code>gray_code</code> function to compute the rest. I want to generate all the gray codes inside the function it... | 0 | 2016-08-03T08:52:31Z | 38,739,875 | <p>It's relatively easy to do if you implement the function iteratively (even if it's defined recursively). This will often execute more quickly as it generally requires fewer function calls.</p>
<pre><code>def gray_code(n):
if n < 1:
g = []
else:
g = ['0', '1']
n -= 1
while ... | 1 | 2016-08-03T09:38:56Z | [
"python",
"algorithm",
"recursion",
"gray-code"
] |
Generating gray codes. | 38,738,835 | <p>I tried generating gray codes in <em>Python</em>. This code works correctly. The issue is that I am initialising the base case (<code>n=1,[0,1]</code>) in the <code>main</code> function and passing it to <code>gray_code</code> function to compute the rest. I want to generate all the gray codes inside the function it... | 0 | 2016-08-03T08:52:31Z | 38,745,459 | <p>Generating Gray codes is easier than you think. The secret is that the Nth gray code is in the bits of N^(N>>1)</p>
<p>So:</p>
<pre><code>def main():
n=int(raw_input())
for i in range(0, 1<<n):
gray=i^(i>>1)
print "{0:0{1}b}".format(gray,n),
main()
</code></pre>
| 2 | 2016-08-03T13:46:05Z | [
"python",
"algorithm",
"recursion",
"gray-code"
] |
Why my view is not found in django rest framework? | 38,738,883 | <p>I am working on mezzanine rest api and adding some more views to be able to work easily. I coded one view and made its serializer but when trying to hit from postman, I am getting error not found 404</p>
<p><code>Views.py</code></p>
<pre><code>@csrf_exempt
@api_view(['POST'])
def create_site_record(request):
s... | 2 | 2016-08-03T08:54:34Z | 38,739,074 | <p>It looks like a problem with your url path. There is no need to have the digit capture for a create endpoint, since that is generally used for referencing an existing object. Try changing the path to <code>url(r'^create/$', create_site_record)</code> and send the POST request to<code>http://localhost:8000/api/create... | 1 | 2016-08-03T09:03:17Z | [
"python",
"django",
"django-rest-framework"
] |
How to implement a mouse hovering callback on canvas items in tkinter? | 38,738,915 | <p>I used the code below which I found on internet to implement a mouse hovering action in python:</p>
<pre><code>from tkinter import *
import numpy as np
class rect:
def __init__(self, root):
self.root = root
self.size = IntVar()
self.canvas = Canvas(self.root, width=800, height=300)
... | 2 | 2016-08-03T08:56:02Z | 38,740,329 | <p>I changed <code>motion</code> method and added <code>self.last = None</code> to <code>__init__</code> method:</p>
<pre><code>from tkinter import *
import numpy as np
class rect:
def __init__(self, root):
self.root = root
self.size = IntVar()
self.canvas = Canvas(self.root, width=800, he... | 0 | 2016-08-03T09:59:14Z | [
"python",
"tkinter",
"tkinter-canvas",
"mousehover"
] |
How to implement a mouse hovering callback on canvas items in tkinter? | 38,738,915 | <p>I used the code below which I found on internet to implement a mouse hovering action in python:</p>
<pre><code>from tkinter import *
import numpy as np
class rect:
def __init__(self, root):
self.root = root
self.size = IntVar()
self.canvas = Canvas(self.root, width=800, height=300)
... | 2 | 2016-08-03T08:56:02Z | 38,740,334 | <p>You can pass the argument <code>activefill</code> when creating your rectangle.</p>
<p>From <a href="http://effbot.org/tkinterbook/canvas.htm#Tkinter.Canvas.create_rectangle-method" rel="nofollow">effboot.org</a>:</p>
<blockquote>
<p>Fill color to use when the mouse pointer is moved over the item, if
different... | 3 | 2016-08-03T09:59:30Z | [
"python",
"tkinter",
"tkinter-canvas",
"mousehover"
] |
PyQt - Hide MainWindow and show QDialog without the taskbar icon disappearing | 38,739,009 | <p>I've been using the code from this example <a href="http://stackoverflow.com/questions/22538247/pyqt-how-to-hide-qmainwindow">PyQt: How to hide QMainWindow</a>:</p>
<pre><code>class Dialog_02(QtGui.QMainWindow):
def __init__(self, parent):
super(Dialog_02, self).__init__(parent)
# ensure this wi... | 0 | 2016-08-03T09:00:23Z | 38,749,079 | <p>Just guessing (because I don't know what platform you're on, and I don't use a task-bar myself, so I cant really test it), but try getting rid of the parent:</p>
<pre><code>class Dialog_02(QtGui.QMainWindow):
def __init__(self, other_window):
super(Dialog_02, self).__init__()
# ensure this windo... | 1 | 2016-08-03T16:29:15Z | [
"python",
"pyqt",
"pyside"
] |
How to group each block's data together instead of being grouped by the their xpath? | 38,739,014 | <p>Let's say I'm scraping data from structure that looks like this:</p>
<pre><code><div id="main">
<span class="name">$somename</span>
<span class="email">$someemial</span>
<span class="phone">$phone</span>
</div>
</code></pre>
<p>The scrapy code tha... | 1 | 2016-08-03T09:00:32Z | 38,740,063 | <p>I'd suggest using a zipped variable for it. Something like this: </p>
<pre><code>for sel in xpath('//body'):
name = sel.xpath('//div[@id="main"]/span[@class="name"]')
email = sel.xpath('//div[@id="main"]/span[@class="email"]')
phone = sel.xpath('//div[@id="main"]/span[@class="phone"]')
result = zip(... | 1 | 2016-08-03T09:47:04Z | [
"python",
"scrapy"
] |
How to group each block's data together instead of being grouped by the their xpath? | 38,739,014 | <p>Let's say I'm scraping data from structure that looks like this:</p>
<pre><code><div id="main">
<span class="name">$somename</span>
<span class="email">$someemial</span>
<span class="phone">$phone</span>
</div>
</code></pre>
<p>The scrapy code tha... | 1 | 2016-08-03T09:00:32Z | 38,743,544 | <p>This is more of a python question. For this kinds of data structure the best way to accomplish this is by using dictionaries:</p>
<pre><code>dictExample={}
dictExample['name']=sel.xpath('//div[@id="main"]/span[@class="name"]')
dictExample['email']=sel.xpath('//div[@id="main"]/span[@class="email"]')
dictExample['pho... | 1 | 2016-08-03T12:22:23Z | [
"python",
"scrapy"
] |
access site behind login.microsoftonline oatuth2 with python requests | 38,739,057 | <p>trying to login login to a website hosted behind login.microsoftonline.com (think this a Azure cloud deployment) oauth2 site with python requests</p>
<p>How should i go about structuring the request?</p>
| 0 | 2016-08-03T09:02:10Z | 38,970,981 | <p>@chris, I see you want to access a website via construct a request with access token which got by authentication with OAuth2 on Azure. Please follow the <a href="https://azure.microsoft.com/en-us/documentation/articles/active-directory-protocols-oauth-code/#register-your-application-with-your-ad-tenant" rel="nofollo... | 0 | 2016-08-16T09:16:52Z | [
"python",
"azure",
"python-requests"
] |
Python dictionary operation | 38,739,113 | <p>I have something like the following dictionary:</p>
<pre><code>dict = {}
dict[(-1,"first")]=3
dict[(-1,"second")]=1
dict[(-1,"third")]=5
dict[(0,"first")]=4
dict[(0,"second")]=6
dict[(0,"third")]=7
dict[(1,"first")]=34
dict[(1,"second")]=45
dict[(1,"third")]=66
dict[(2,"first")]=3
dict[(2,"second")]=1
dict[(2,"thir... | 2 | 2016-08-03T09:05:28Z | 38,739,340 | <p>Why do you want to keep the order ?
I suggest you to use this kind of loop</p>
<pre><code>dict_r = {}
dict_r["first"] = []
dict_r["second"] = []
dict_r["third"] = []
for i in range (0,3):
dict_r["first"].append(dict[i,"first"])
dict_r["second"].append(dict[i,"second"])
dict_r["third"].append(dict[i,"thi... | 2 | 2016-08-03T09:15:10Z | [
"python",
"dictionary"
] |
Python dictionary operation | 38,739,113 | <p>I have something like the following dictionary:</p>
<pre><code>dict = {}
dict[(-1,"first")]=3
dict[(-1,"second")]=1
dict[(-1,"third")]=5
dict[(0,"first")]=4
dict[(0,"second")]=6
dict[(0,"third")]=7
dict[(1,"first")]=34
dict[(1,"second")]=45
dict[(1,"third")]=66
dict[(2,"first")]=3
dict[(2,"second")]=1
dict[(2,"thir... | 2 | 2016-08-03T09:05:28Z | 38,739,417 | <p>I will do something like that (using <a class='doc-link' href="http://stackoverflow.com/documentation/python/498/collections/1636/collections-defaultdict#t=201608030921439071977">defaultdict</a> for convenient):</p>
<pre><code>from collections import defaultdict
new_dict = defaultdict(list)
for (x,k),v in sorted(o... | 1 | 2016-08-03T09:18:28Z | [
"python",
"dictionary"
] |
Python dictionary operation | 38,739,113 | <p>I have something like the following dictionary:</p>
<pre><code>dict = {}
dict[(-1,"first")]=3
dict[(-1,"second")]=1
dict[(-1,"third")]=5
dict[(0,"first")]=4
dict[(0,"second")]=6
dict[(0,"third")]=7
dict[(1,"first")]=34
dict[(1,"second")]=45
dict[(1,"third")]=66
dict[(2,"first")]=3
dict[(2,"second")]=1
dict[(2,"thir... | 2 | 2016-08-03T09:05:28Z | 38,739,820 | <pre><code>dict = {}
dict[(-1,"first")]=3
dict[(-1,"second")]=1
dict[(-1,"third")]=5
dict[(0,"first")]=4
dict[(0,"second")]=6
dict[(0,"third")]=7
dict[(1,"first")]=34
dict[(1,"second")]=45
dict[(1,"third")]=66
dict[(2,"first")]=3
dict[(2,"second")]=1
dict[(2,"third")]=2
dict_1 = {}
for num,txt in sorted(dict.keys()):
... | 0 | 2016-08-03T09:36:06Z | [
"python",
"dictionary"
] |
Python/Pandas Iterating through columns | 38,739,196 | <p>I have a DataFrame which looks like this (with many additional columns)</p>
<pre><code> age1 age2 age3 age 4 \
Id#
1001 5 6 2 8
1002 7 6 1 0
1003 10 9 7 5
1004 9 12 5 ... | 4 | 2016-08-03T09:09:14Z | 38,739,320 | <p>You can use <a href="http://pandas.pydata.org/pandas-docs/stable/generated/pandas.DataFrame.add.html" rel="nofollow"><code>add</code></a> with <a href="http://pandas.pydata.org/pandas-docs/stable/generated/pandas.DataFrame.shift.html" rel="nofollow"><code>shift</code></a>ed <code>DataFrame</code>:</p>
<pre><code>pr... | 2 | 2016-08-03T09:14:24Z | [
"python",
"loops",
"pandas",
"dataframe",
"iteration"
] |
Python/Pandas Iterating through columns | 38,739,196 | <p>I have a DataFrame which looks like this (with many additional columns)</p>
<pre><code> age1 age2 age3 age 4 \
Id#
1001 5 6 2 8
1002 7 6 1 0
1003 10 9 7 5
1004 9 12 5 ... | 4 | 2016-08-03T09:09:14Z | 38,739,650 | <p>It sounds like <code>cumsum</code> is what you are looking for:</p>
<pre><code>In [5]: df
Out[5]:
age1 age2 age3 age4
Id#
1001 5 6 2 8
1002 7 6 1 0
1003 10 9 7 5
1004 9 12 5 9
In [6]: df.cumsum(axis=1)
Out[6]:
a... | 2 | 2016-08-03T09:28:58Z | [
"python",
"loops",
"pandas",
"dataframe",
"iteration"
] |
How to install gensim on windows | 38,739,250 | <p>Not able to install gensim on windows.Please help me I need to gensim Immediately and tell me installation steps with More details and other software that needs to be installed before it. thanks</p>
| 0 | 2016-08-03T09:11:31Z | 38,739,531 | <p>Gensim depends on scipy and numpy.You must have them installed prior to installing gensim.Simple way to install gensim in windows is, open cmd and type</p>
<p>pip install -U gensim</p>
<p>Or download gensim for windows from</p>
<p><a href="https://pypi.python.org/pypi/gensim" rel="nofollow">https://pypi.python.or... | 0 | 2016-08-03T09:22:43Z | [
"python",
"gensim"
] |
How to install gensim on windows | 38,739,250 | <p>Not able to install gensim on windows.Please help me I need to gensim Immediately and tell me installation steps with More details and other software that needs to be installed before it. thanks</p>
| 0 | 2016-08-03T09:11:31Z | 38,758,779 | <p>I struggled with this a bit today trying to figure out if I needed a python 2.7 environment or if I could use my 3.5. I ended up doing this from an Anaconda 3.5 install:</p>
<p>conda install -c anaconda gensim=0.12.4</p>
<p>After a few hours of trying various things, suddenly it all worked on 3.5. My error was t... | 0 | 2016-08-04T04:59:45Z | [
"python",
"gensim"
] |
Receiving data from com port by pyserial | 38,739,336 | <p>I can't receive data from com port by pyserial! I have compiled program that send data and receive answer from controller correctly! I used comport monitor program to spy request and answer from controller:<a href="http://i.stack.imgur.com/7lOt5.png" rel="nofollow">correct send and answer</a></p>
<p>But when I send... | 0 | 2016-08-03T09:14:55Z | 38,740,027 | <p>You'll not receive your own message on the com port you write it to. Either connect the other side of the cable to a different port, or communicate with a device that will answer you.</p>
| 0 | 2016-08-03T09:45:31Z | [
"python",
"serial-port",
"pyserial"
] |
How to set Python Tornado pretty log | 38,739,384 | <p>I write log from tornado like this:</p>
<pre><code>app_log = logging.getLogger("tornado.application")
</code></pre>
<p>And logs output without color:</p>
<pre><code>[W 160803 17:04:32 test:68] warn
[E 160803 17:04:32 test:69] error
[I 160803 17:04:32 test:72] info
</code></pre>
<p>Even I call <code>enable_pretty... | 0 | 2016-08-03T09:16:55Z | 38,757,469 | <p>Color is used when two conditions are met:</p>
<ul>
<li>stderr is a tty (i.e. not redirected to a file or pipe)</li>
<li>the <code>curses</code> module believes that color is supported (based on the <code>TERM</code> environment variable)</li>
</ul>
<p>If <code>TERM</code> is unset, try setting <code>TERM=ansi</co... | 0 | 2016-08-04T02:17:43Z | [
"python",
"logging",
"tornado"
] |
Django error: render_to_response() got an unexpected keyword argument 'context_instance' | 38,739,422 | <p>After upgrading to Django 1.10, I get the error <code>render_to_response() got an unexpected keyword argument 'context_instance'</code>.</p>
<p>My view is as follows:</p>
<pre><code>from django.shortcuts import render_to_response
from django.template import RequestContext
def my_view(request):
context = {'foo... | 7 | 2016-08-03T09:18:34Z | 38,739,423 | <p>The <code>context_instance</code> parameter in <code>render_to_response</code> was <a href="https://docs.djangoproject.com/en/1.10/releases/1.8/#dictionary-and-context-instance-arguments-of-rendering-functions">deprecated in Django 1.8</a>, and removed in Django 1.10.</p>
<p>The solution is to switch to the <a href... | 23 | 2016-08-03T09:18:34Z | [
"python",
"django"
] |
Is it possible to mix Eve (Python) Mongo schemata and Eve SQLAlchemy schemata? | 38,739,457 | <p>I want to create an API which on one side can use the normal mongodb interface for storing documents but on the other side access user data which is stored in a SQL database.</p>
<p>Therefore: Is it possible to mix Eve Mongo and <a href="https://eve-sqlalchemy.readthedocs.io/en/stable/tutorial.html" rel="nofollow">... | 1 | 2016-08-03T09:19:43Z | 38,761,803 | <p>No, currently that's not possible since you can either use the default mongo data engine <em>or</em> switch it with the Eve-Sqlalchemy engine.</p>
| 0 | 2016-08-04T08:06:54Z | [
"python",
"sqlalchemy",
"eve"
] |
need help : python3.5.2 & pygame | 38,739,472 | <p>I'm from Taiwan, and I need help to install pygame.<br>
I've been trying for a long time.<br>
<a href="http://i.stack.imgur.com/Pr63F.png" rel="nofollow">pygame file</a><br>
<a href="http://i.stack.imgur.com/rhwJp.png" rel="nofollow">cmd result</a><br>
I want to ask if I download the right pygame file.
If not please... | 2 | 2016-08-03T09:20:19Z | 38,739,808 | <p><strong>Option 1:</strong>
You have a 32bit install of Python (even if your Windows is 64-bit).</p>
<p>You can check if this is the case by looking at the output of </p>
<pre><code>import struct;print(struct.calcsize("P") * 8)
</code></pre>
<p>if so, you will need to download the 32bit version of pygame not the 6... | 0 | 2016-08-03T09:35:33Z | [
"python",
"pygame"
] |
Python print both the matching groups in regex | 38,739,589 | <p>I want to find two fixed patterns from a log file. Here is a line in a log file looks like</p>
<blockquote>
<p>passed dangerb.xavier64.423181.k000.drmanhattan_resources.log Aug 23
04:19:37 84526 362</p>
</blockquote>
<p>From this log, I want to extract <code>drmanhattan</code> and <code>362</code> w... | 0 | 2016-08-03T09:25:39Z | 38,739,709 | <p><code>|</code> mean OR so your regex catch <code>(\w+_\w+)</code> OR <code>(\d+$)</code></p>
<p>Maybe you want something like this :</p>
<pre><code>((\w+_\w+).*?(\d+$))
</code></pre>
| 1 | 2016-08-03T09:31:11Z | [
"python",
"regex",
"python-2.7"
] |
Python print both the matching groups in regex | 38,739,589 | <p>I want to find two fixed patterns from a log file. Here is a line in a log file looks like</p>
<blockquote>
<p>passed dangerb.xavier64.423181.k000.drmanhattan_resources.log Aug 23
04:19:37 84526 362</p>
</blockquote>
<p>From this log, I want to extract <code>drmanhattan</code> and <code>362</code> w... | 0 | 2016-08-03T09:25:39Z | 38,739,745 | <pre><code>line = 'Passed dangerb.xavier64.423181.r000.drmanhattan_resources.log Aug 23 04:19:37 84526 362'
match1 = re.search(r'(\w+_\w+).*?(\d+$)', line)
if match1:
print match1.groups()
# ('drmanhattan_resources', '362')
</code></pre>
<p>If you have a <code>test.txt</code> file that contains the following ... | 1 | 2016-08-03T09:32:50Z | [
"python",
"regex",
"python-2.7"
] |
Python print both the matching groups in regex | 38,739,589 | <p>I want to find two fixed patterns from a log file. Here is a line in a log file looks like</p>
<blockquote>
<p>passed dangerb.xavier64.423181.k000.drmanhattan_resources.log Aug 23
04:19:37 84526 362</p>
</blockquote>
<p>From this log, I want to extract <code>drmanhattan</code> and <code>362</code> w... | 0 | 2016-08-03T09:25:39Z | 38,739,853 | <p>With <code>re.search</code> you only get the first match, if any, and with <code>|</code> you tell <code>re</code> to look for <em>either</em> this <em>or</em> that pattern. As suggested in other answers, you could replace the <code>|</code> with <code>.*</code> to match "anything in between" those two pattern. Alte... | 1 | 2016-08-03T09:37:42Z | [
"python",
"regex",
"python-2.7"
] |
Protobuf3: Serialize a Python object to JSON | 38,739,603 | <p>According to <a href="https://github.com/google/protobuf/releases/tag/v3.0.0" rel="nofollow">the manual</a>, Protobuf 3.0.0 supports JSON serialization:</p>
<blockquote>
<p>A well-defined encoding in JSON as an alternative to binary proto encoding.</p>
</blockquote>
<p><strong>What have I tried</strong></p>
<ul... | 1 | 2016-08-03T09:26:22Z | 38,740,630 | <p>There is a function 'MessageToJson' in the json_format module. This function can be used to serialize the message.</p>
| 2 | 2016-08-03T10:11:10Z | [
"python",
"json",
"serialization",
"protocol-buffers-3"
] |
Protobuf3: Serialize a Python object to JSON | 38,739,603 | <p>According to <a href="https://github.com/google/protobuf/releases/tag/v3.0.0" rel="nofollow">the manual</a>, Protobuf 3.0.0 supports JSON serialization:</p>
<blockquote>
<p>A well-defined encoding in JSON as an alternative to binary proto encoding.</p>
</blockquote>
<p><strong>What have I tried</strong></p>
<ul... | 1 | 2016-08-03T09:26:22Z | 38,741,473 | <h1>Caveats</h1>
<p>I have mistakingly installed <code>protobuf3</code> - I thought it the, well, <code>protobuf3</code> Python package, but it's an unofficial <strong>Python 3 protobuf 2 package</strong>, not the other way around. Remove it before you start.</p>
<h1>Solution</h1>
<p>After some trial and error, the ... | 1 | 2016-08-03T10:49:55Z | [
"python",
"json",
"serialization",
"protocol-buffers-3"
] |
pyyaml 3.11 pass dictionary to iterator? | 38,739,689 | <p>I use following YAML data:</p>
<pre><code>Document:
InPath: /home/me
OutPath: /home/me
XLOutFile: TestFile1.xlsx
Sheets:
- Sheet: Test123
InFile: Test123.MQSC
Server: Testsystem1
- Sheet: Test345
InFile: Test345.MQSC
Server: Testsystem2
Title:
A: "Server Name"
B: "MQ Version"
C... | 4 | 2016-08-03T09:30:16Z | 38,741,944 | <p>In your code <code>self.ymldata['Sheets']</code> is a list of dictionaries because your YAML source for that:</p>
<pre><code> - Sheet: Test123
InFile: Test123.MQSC
Server: Testsystem1
- Sheet: Test345
InFile: Test345.MQSC
Server: Testsystem2
</code></pre>
<p>is a sequence of mappings (and this i... | 2 | 2016-08-03T11:12:17Z | [
"python",
"python-2.7",
"dictionary",
"iterator",
"pyyaml"
] |
Install Python package: "Package missing in current win-64 channels" | 38,739,694 | <p>I want to install GSEApy on Anaconda (I use 64bit Windows 10).<br>
<a href="https://bioconda.github.io/recipes/gseapy/README.html" rel="nofollow">https://bioconda.github.io/recipes/gseapy/README.html</a><br>
<a href="https://anaconda.org/bioconda/gseapy" rel="nofollow">https://anaconda.org/bioconda/gseapy</a> </p>
... | 4 | 2016-08-03T09:30:33Z | 38,739,991 | <p>You need to use a channel that has a win-64 version. Use:</p>
<pre><code>conda install -c bioninja gseapy
</code></pre>
<p>The option <code>-c</code> or <code>--channel</code> allows to specify a channel.
You can also add a channel permanently via:</p>
<pre><code>conda config --add channels bioninja
</code></pre>... | 2 | 2016-08-03T09:43:58Z | [
"python",
"packages",
"anaconda",
"conda"
] |
Install Python package: "Package missing in current win-64 channels" | 38,739,694 | <p>I want to install GSEApy on Anaconda (I use 64bit Windows 10).<br>
<a href="https://bioconda.github.io/recipes/gseapy/README.html" rel="nofollow">https://bioconda.github.io/recipes/gseapy/README.html</a><br>
<a href="https://anaconda.org/bioconda/gseapy" rel="nofollow">https://anaconda.org/bioconda/gseapy</a> </p>
... | 4 | 2016-08-03T09:30:33Z | 38,998,705 | <p>Now you could install lastest gseapy through bioconda, too </p>
<pre><code>conda install -c bioconda gseapy
</code></pre>
| 0 | 2016-08-17T13:54:12Z | [
"python",
"packages",
"anaconda",
"conda"
] |
How to bring keyboard focus to QTextEdit in PyQt? | 38,739,714 | <p>I've inserted a simple <code>QTextEdit</code> widget into my PyQt user interface. When the user wants to type text into that widget, he has to click on it. My program should be able to make this happen automatically at certain occasions, such that the user can start typing text into that <code>QTextEdit</code> widge... | 1 | 2016-08-03T09:31:15Z | 38,740,228 | <p>Use <a href="http://pyqt.sourceforge.net/Docs/PyQt4/qwidget.html#setFocus" rel="nofollow"><code>setFocus()</code></a> method.</p>
<pre><code>def focus(self):
self.setFocus()
</code></pre>
| 1 | 2016-08-03T09:54:20Z | [
"python",
"python-3.x",
"pyqt",
"pyqt5"
] |
'str' object has no attribute 'message_from_bytes' | 38,739,739 | <p>I have a piece of code to get emails from messages from my inbox (gmail). Getting emails work correct when I print <code>email_from</code> but I would like to do some operation on data split name and email etc. but then code broke after print first loop step and I got the error:</p>
<pre><code>Traceback (most recen... | 1 | 2016-08-03T09:32:19Z | 38,739,949 | <p>In your code you replaced the email variable..</p>
<p>Try this...</p>
<pre><code>import imaplib
import email
from email.header import Header, decode_header, make_header
# Connection settings
HOST = 'imap.gmail.com'
USERNAME = '***'
PASSWORD = '***'
m = imaplib.IMAP4_SSL(HOST, 993)
m.login(USERNAME, PASSWORD)
m.s... | 3 | 2016-08-03T09:42:09Z | [
"python",
"gmail-imap"
] |
Comparing dictionaries by corresponding keys? | 38,739,936 | <p>I'm quite the beginner in Python. </p>
<p>I have two dictionaries, where each key is a product and each value is the price to each product. </p>
<pre><code>productData_1 = {'product_1': '18', 'product_2': '15', 'product_3': '10', 'product_4': '9'}
productData_2 = {'product_1': '18', 'product_3': '12', 'product_2':... | 0 | 2016-08-03T09:41:22Z | 38,740,115 | <p>In Python 3.5:</p>
<pre><code>productData_1 = {'product_1': '18', 'product_2': '15', 'product_3': '10', 'product_4': '9'}
productData_2 = {'product_1': '18', 'product_3': '12', 'product_2': '15'}
keys = set (productData_1.keys () + productData_2.keys ())
for key in keys:
try:
if productData_1 [key] !=... | 0 | 2016-08-03T09:49:15Z | [
"python",
"dictionary"
] |
Comparing dictionaries by corresponding keys? | 38,739,936 | <p>I'm quite the beginner in Python. </p>
<p>I have two dictionaries, where each key is a product and each value is the price to each product. </p>
<pre><code>productData_1 = {'product_1': '18', 'product_2': '15', 'product_3': '10', 'product_4': '9'}
productData_2 = {'product_1': '18', 'product_3': '12', 'product_2':... | 0 | 2016-08-03T09:41:22Z | 38,740,125 | <pre><code>for key in productData_1.keys()|productData_2.keys():
if key not in productData_1:
print('{} missing from productData_1!'.format(key))
continue
if key not in productData_2:
print('{} missing from productData_2!'.format(key))
continue
print('Difference in prices for... | 0 | 2016-08-03T09:49:42Z | [
"python",
"dictionary"
] |
Comparing dictionaries by corresponding keys? | 38,739,936 | <p>I'm quite the beginner in Python. </p>
<p>I have two dictionaries, where each key is a product and each value is the price to each product. </p>
<pre><code>productData_1 = {'product_1': '18', 'product_2': '15', 'product_3': '10', 'product_4': '9'}
productData_2 = {'product_1': '18', 'product_3': '12', 'product_2':... | 0 | 2016-08-03T09:41:22Z | 38,740,269 | <pre><code>keys_unique_to_1 = [key for key in productData_1 if key not in productData_2]
keys_unique_to_2 = [key for key in productData_2 if key not in productData_1]
common_keys = [key for key in productData_1 if key in productData_2]
diff = {key: int(productData_1[key]) - int(productData_2[key]) for key in common_ke... | 0 | 2016-08-03T09:56:01Z | [
"python",
"dictionary"
] |
Comparing dictionaries by corresponding keys? | 38,739,936 | <p>I'm quite the beginner in Python. </p>
<p>I have two dictionaries, where each key is a product and each value is the price to each product. </p>
<pre><code>productData_1 = {'product_1': '18', 'product_2': '15', 'product_3': '10', 'product_4': '9'}
productData_2 = {'product_1': '18', 'product_3': '12', 'product_2':... | 0 | 2016-08-03T09:41:22Z | 38,740,327 | <p>There's a good page <a href="http://stackoverflow.com/questions/3294889/iterating-over-dictionaries-using-for-loops-in-python">here</a> on this issue. You can loop through both your dictionaries and compare their values. The example hereunder shows how you can print the keys for which your values are equal.</p>
<p>... | 0 | 2016-08-03T09:59:07Z | [
"python",
"dictionary"
] |
Comparing dictionaries by corresponding keys? | 38,739,936 | <p>I'm quite the beginner in Python. </p>
<p>I have two dictionaries, where each key is a product and each value is the price to each product. </p>
<pre><code>productData_1 = {'product_1': '18', 'product_2': '15', 'product_3': '10', 'product_4': '9'}
productData_2 = {'product_1': '18', 'product_3': '12', 'product_2':... | 0 | 2016-08-03T09:41:22Z | 38,740,508 | <pre><code>productData_1 = {'product_1': '18', 'product_2': '15', 'product_3': '10', 'product_4': '9'}
productData_2 = {'product_1': '18', 'product_3': '12', 'product_2': '15'}
matched_keys = []
unmatched_keys = []
matched_value = []
unmatched_value = []
for ind,value in productData_1.items():
if ind in productDa... | 0 | 2016-08-03T10:06:14Z | [
"python",
"dictionary"
] |
Does ply's YACC support the Extended Backus-Naur Form? | 38,740,061 | <p><a href="http://www.dabeaz.com/ply/PLYTalk.pdf" rel="nofollow">The examples I've seen</a> always use the "simple" BNF. Here's an example of a part of my silly development:</p>
<pre><code>def p_expression(p):
"""expression : NUMBER
| NAME
| NEGATION
| INCREMENT
... | 0 | 2016-08-03T09:47:02Z | 38,747,805 | <p>No, PLY (like yacc) does not support extended BNF.</p>
<p>The page you refer to provides a strategy for constructing <em>top-down</em> parsers, while the parsers built by yacc (as well as Bison, PLY and other derivatives) build bottom-up parsers. The advantage of a bottom-up parser is that the grammar used to parse... | 1 | 2016-08-03T15:27:16Z | [
"python",
"parsing",
"yacc",
"bnf",
"ply"
] |
Python subprocess.check_call() not recognising pushd and popd | 38,740,215 | <p>I'm on Ubuntu 15.04 (not by choice obviously) and Python 3.4.3 and I'm trying to execute something like the following.</p>
<pre><code>subprocess.check_call("pushd /tmp", shell=True)
</code></pre>
<p>I need the <code>shell=True</code> because the actual code I'm trying to execute contains wildcards that need to be ... | 0 | 2016-08-03T09:53:54Z | 38,740,640 | <p>You have two problems with your code. The first one is that the shell used by default is <code>/bin/sh</code> which doesn't support <code>pushd</code> and <code>popd</code>.
In your question you failed to provide the whole error output, and at the top of it you should see the line:</p>
<pre><code>/bin/sh: 1: popd:... | 2 | 2016-08-03T10:11:34Z | [
"python",
"bash",
"python-3.x",
"subprocess",
"ubuntu-15.04"
] |
How to define a triple layer dictionary in python? | 38,740,300 | <p>I want to create the following structure for a dictionary:</p>
<pre><code>{ id1: {id2: {id3: [] }}}
</code></pre>
<p>That would be a triple dictionary that will finally point to a list.</p>
<p>I use the following code to initiate it in Python:</p>
<pre><code>for i in range(2160):
for j in range(2160):
... | 3 | 2016-08-03T09:57:48Z | 38,740,548 | <p>Do you really need 10 billion entries (2,160 ** 3 == 10,077,696,000) in this structure? It's unlikely that any disk-based solution will be quicker than a memory-based one, but at the same time your program might be exceeding the bounds of real memory, causing "page thrashing" to occur.</p>
<p>Without knowing anythi... | 2 | 2016-08-03T10:07:55Z | [
"python",
"dictionary",
"optimization",
"data-structures"
] |
Django Mezzanine ImportError: No module named apps | 38,740,421 | <p>I had a working mezzanine project configured with apache and mod_wsgi. I tried to added an app to the project and restarted apache and suddenly the project is throwing the error even after undoing the changes. Getting the same error when I'm trying to run python manage.py check:</p>
<pre><code>Traceback (most recen... | 1 | 2016-08-03T10:03:02Z | 38,747,153 | <p>You say you have a folder named <code>apps</code> in your Django installation, but the traceback shows it is executing code that was removed in 1.7, the same version that introduced <code>django.apps</code>. Your installation is most likely corrupt and has files from different versions.</p>
<p>Uninstall Django from... | 0 | 2016-08-03T14:58:28Z | [
"python",
"django",
"mezzanine"
] |
How to split dataframe according to intersection point in Python? | 38,740,423 | <p>I am working on a project which is aiming to show difference between good form and bad form of an exercise. To do this we collected the acceleration data with wrist based accelerometer. <a href="http://i.stack.imgur.com/bZg1U.png" rel="nofollow"><img src="http://i.stack.imgur.com/bZg1U.png" alt="enter image descript... | 0 | 2016-08-03T10:03:04Z | 38,791,129 | <p>Well, I found another way to detect periodic parts of my accelerometer data. So, Here is my code:</p>
<pre><code>import numpy as np
from peakdetect import peakdetect
import datetime as dt
import matplotlib.pyplot as plt
import matplotlib.gridspec as gridspec
from matplotlib import style
from pandas import DataFrame... | 0 | 2016-08-05T14:00:12Z | [
"python",
"pandas",
"dataframe"
] |
merge adjacent number in a list in python | 38,740,424 | <p>I have a list that contains a random number of ints.
I would like to iterate over this list, and if a number and the successive number are within one numeric step of one another, I would like to concatenate them into a sublist.</p>
<p>For example:</p>
<pre><code>input = [1,2,4,6,7,8,10,11]
output = [[1,2],[4],[6,7... | 1 | 2016-08-03T10:03:05Z | 38,740,829 | <p>Nice way (found the "splitting" indices and then <a class='doc-link' href="http://stackoverflow.com/documentation/python/1494/list-slicing-selecting-parts-of-lists/4863/selecting-a-sublist-from-a-list#t=201608031037013525241">slice</a> the list accordingly):</p>
<pre><code>input = [1,2,4,6,7,8,10,11]
idx = [0] + [i... | 0 | 2016-08-03T10:20:55Z | [
"python",
"list",
"python-3.x",
"list-comprehension",
"listiterator"
] |
merge adjacent number in a list in python | 38,740,424 | <p>I have a list that contains a random number of ints.
I would like to iterate over this list, and if a number and the successive number are within one numeric step of one another, I would like to concatenate them into a sublist.</p>
<p>For example:</p>
<pre><code>input = [1,2,4,6,7,8,10,11]
output = [[1,2],[4],[6,7... | 1 | 2016-08-03T10:03:05Z | 38,741,384 | <p>Unless you have to have a one-liner, you could use a simple generator function, combining elements until you hit a non consecutive element:</p>
<pre><code>def consec(lst):
it = iter(lst)
prev = next(it)
tmp = [prev]
for ele in it:
if prev + 1 != ele:
yield tmp
tmp = [... | 0 | 2016-08-03T10:46:08Z | [
"python",
"list",
"python-3.x",
"list-comprehension",
"listiterator"
] |
merge adjacent number in a list in python | 38,740,424 | <p>I have a list that contains a random number of ints.
I would like to iterate over this list, and if a number and the successive number are within one numeric step of one another, I would like to concatenate them into a sublist.</p>
<p>For example:</p>
<pre><code>input = [1,2,4,6,7,8,10,11]
output = [[1,2],[4],[6,7... | 1 | 2016-08-03T10:03:05Z | 38,742,081 | <p>Simplest version I have without any imports:</p>
<pre><code>def mergeAdjNum(l):
r = [[l[0]]]
for e in l[1:]:
if r[-1][-1] == e - 1:
r[-1].append(e)
else:
r.append([e])
return r
</code></pre>
<p>About 33% faster than one liners.</p>
<p>This one handles the charac... | 0 | 2016-08-03T11:18:54Z | [
"python",
"list",
"python-3.x",
"list-comprehension",
"listiterator"
] |
Transform numpy array to RGB image array | 38,740,495 | <p>Consider the following code:</p>
<pre><code>import numpy as np
rand_matrix = np.random.rand(10,10)
</code></pre>
<p>which generates a 10x10 random matrix.</p>
<p>Following code to display as colour map:</p>
<pre><code>import matplotlib.pyplot as plt
plt.imshow(rand_matrix)
plt.show()
</code></pre>
<p>I would li... | 0 | 2016-08-03T10:05:49Z | 38,740,915 | <p>You can save time by saving to a <code>io.BytesIO</code> instead of to a file:</p>
<pre><code>import io
import numpy as np
import matplotlib.pyplot as plt
import matplotlib.image as mpimg
from PIL import Image
def ax_to_array(ax, **kwargs):
fig = ax.figure
frameon = ax.get_frame_on()
ax.set_frame_on(Fa... | 1 | 2016-08-03T10:24:31Z | [
"python",
"image",
"numpy",
"rgb"
] |
Python in C++ or C++ pure for file templates manipulation? | 38,740,520 | <p>(I don't know if I can post such a question here)</p>
<p>I have a problem for which I need a suggestion. I've a C++ code that derive several parameters (which are numbers basically). Such numbers have to be used to generate further code, of which I have templates, as very trivial example a template could look as so... | 1 | 2016-08-03T10:06:52Z | 38,740,743 | <p>Although I am a Python enthusiast, I think for this one you should stay within C++ (since it seems you have already a significant amount of C++ code) and use a decent library like Boost. You could consider using Cython as a bridge, but my estimation is that it would be overkill.</p>
| 1 | 2016-08-03T10:16:42Z | [
"python",
"c++",
"file"
] |
Is plug-in based approach considered good practice for GUI app development in PyQt? | 38,740,649 | <p>I'm thinking of using a plug-in based UI architecture to develop my PyQt project, i.e. create a skeleton main window which will dynamically load all the other UI components and these UI components will be made as PyQt plugins. </p>
<p>Since I'm quite new to PyQt, I'm wondering if this is a good practice that people... | 1 | 2016-08-03T10:12:11Z | 38,787,357 | <p>A plugin based architecture is a very powerful way to design scalable, maintainable, extensible software. If you intend to build software where you consider certain parts of it should be plugins just go for it because in python implementing plugins is straightforward.</p>
<p>Of course, all depends what type of soft... | 0 | 2016-08-05T10:46:45Z | [
"python",
"python-2.7",
"pyqt"
] |
How to make python import an identically named module from the local directory instead site-packages? | 38,740,672 | <p>I'm a bit confused on how python separates between modules installed in site-packages and modules in the local directory if they have identical names and what's the best way to make python import the module from the local directory instead of the installed one. </p>
<p>Basically I have a command line app and I'm us... | 0 | 2016-08-03T10:13:19Z | 38,740,880 | <p>The easiest way to nominate additional directories to be searched when trying to import modules is to add them to the <code>sys.path</code> list.</p>
<p>The interpreter looks at an environment variable called <code>$PYTHONPATH</code>, which should be a colon-separated (Windows: semi-colon separated) list of directo... | 0 | 2016-08-03T10:23:25Z | [
"python",
"setuptools"
] |
How to make python import an identically named module from the local directory instead site-packages? | 38,740,672 | <p>I'm a bit confused on how python separates between modules installed in site-packages and modules in the local directory if they have identical names and what's the best way to make python import the module from the local directory instead of the installed one. </p>
<p>Basically I have a command line app and I'm us... | 0 | 2016-08-03T10:13:19Z | 38,741,016 | <p>if scriptA.py is in the same directory of main.py can't you just <code>import .scriptA</code> ?</p>
<p>The <code>.</code> is a shortcut that tells python to search in current package before rest of the <code>PYTHONPATH</code></p>
| 0 | 2016-08-03T10:29:10Z | [
"python",
"setuptools"
] |
Python simple brackets parser | 38,740,853 | <p>I basically have a file with this structure: </p>
<pre><code>root \
{
field1 {
subfield_a {
"value1"
}
subfield_b {
"value2"
}
subfield_c {
"value1"
"value2"
"value3"
}
subfield_d {
}
}
field2 {
subfield_a {
"value1"
}
subfield_b ... | 0 | 2016-08-03T10:22:10Z | 38,933,432 | <p>You can let pyparsing take care of the matching and iterating over the input, just define what you want it to match, and pass it the body of the file as a string:</p>
<pre><code>def magic_parse_function(fld_name, source):
from pyparsing import Keyword, nestedExpr
# define parser
parser = Keyword(fld_na... | 1 | 2016-08-13T13:53:43Z | [
"python",
"parsing"
] |
XGBoost difference in train and test features after converting to DMatrix | 38,740,885 | <p>Just wondering how is possible next case:</p>
<pre><code> def fit(self, train, target):
xgtrain = xgb.DMatrix(train, label=target, missing=np.nan)
self.model = xgb.train(self.params, xgtrain, self.num_rounds)
</code></pre>
<p><a href="http://i.stack.imgur.com/8GQ0v.png" rel="nofollow"><img src="http://i.... | 1 | 2016-08-03T10:23:37Z | 38,875,449 | <p>This situation can happen after one-hot encoding. For example,</p>
<pre><code>ar = np.array([
[1, 2],
[1, 0]
])
enc = OneHotEncoder().fit(ar)
ar2 = enc.transform(ar)
b = np.array([[1, 0]])
b2 = enc.transform(b)
xgb_ar = xgb.DMatrix(ar2)
xgb_b = xgb.DMatrix(b2)
print(b2.shape) # (1, 3)
print(xgb_b.... | 1 | 2016-08-10T13:54:31Z | [
"python",
"python-2.7",
"numpy",
"machine-learning",
"xgboost"
] |
XGBoost difference in train and test features after converting to DMatrix | 38,740,885 | <p>Just wondering how is possible next case:</p>
<pre><code> def fit(self, train, target):
xgtrain = xgb.DMatrix(train, label=target, missing=np.nan)
self.model = xgb.train(self.params, xgtrain, self.num_rounds)
</code></pre>
<p><a href="http://i.stack.imgur.com/8GQ0v.png" rel="nofollow"><img src="http://i.... | 1 | 2016-08-03T10:23:37Z | 38,887,112 | <p>One another possibility is to have one feature level exclusively in training data not in testing data. This situation happens mostly while post one hot encoding whose resultant is big matrix have level for each level of categorical features. In your case it looks like "f5232" is either exclusive in training or test ... | 1 | 2016-08-11T04:08:16Z | [
"python",
"python-2.7",
"numpy",
"machine-learning",
"xgboost"
] |
What mistake am I making in my code? | 38,740,997 | <p>For some reason my code doesn't seem to add to q, it prints out 0 for q even though there are 11 lines in the csv file, all I want to check if the csv file is empty, the code doesn't work in my script, but in the python console it works fine.</p>
<pre><code>with open('File.csv', 'r') as FILE:
q=0;LS = reader(F... | 1 | 2016-08-03T10:28:19Z | 38,741,286 | <p>The <code>i</code> is iterating through the rows in <code>LS</code>, so if you have a file with 1 line it will be 1, if you have an empty file it will be 0, etc... I suspect your file is empty, or the opening did not succeed.</p>
| 1 | 2016-08-03T10:41:41Z | [
"python",
"csv",
"with-statement"
] |
What mistake am I making in my code? | 38,740,997 | <p>For some reason my code doesn't seem to add to q, it prints out 0 for q even though there are 11 lines in the csv file, all I want to check if the csv file is empty, the code doesn't work in my script, but in the python console it works fine.</p>
<pre><code>with open('File.csv', 'r') as FILE:
q=0;LS = reader(F... | 1 | 2016-08-03T10:28:19Z | 38,741,359 | <p>Are you sure the file name is correct and in the same folder? I ran your script with a csv file I quickly made (contents: 1,2) and it outputted 1 as expected. Also make sure that your example code can be executed by itself, so include <code>from csv import reader</code> in the future.</p>
| 2 | 2016-08-03T10:44:52Z | [
"python",
"csv",
"with-statement"
] |
Reading excel and storing data with xlrd | 38,741,099 | <p>I have this data in excel sheet </p>
<pre><code>FT_NAME FC_NAME C_NAME
FT_NAME1 FC1 C1
FT_NAME2 FC21 C21
FC22 C22
FT_NAME3 FC31 C31
FC32 C32
FT_NAME4 FC4 C4
</code></pre>
<p>where column names are </p>
<blockquote>
<p>FT_NAME,FC_NAME,C_NAME</p>
</block... | 0 | 2016-08-03T10:32:55Z | 38,741,855 | <p>You can use <code>pandas</code>. It reads the data into a DataFrame which is essentially a big dictionary. </p>
<pre><code>import pandas as pd
data =pd.read_excel('file.xlsx', 'Sheet1')
data = data.fillna(method='pad')
print(data)
</code></pre>
<p>it gives the following output:</p>
<pre><code> FT_NAME FC_NAM... | 0 | 2016-08-03T11:07:06Z | [
"python",
"xlrd"
] |
Python: count specific occurrences in a dictionary | 38,741,110 | <p>Say I have a dictionary like this:</p>
<pre><code>d={
'0101001':(1,0.0),
'0101002':(2,0.0),
'0101003':(3,0.5),
'0103001':(1,0.0),
'0103002':(2,0.9),
'0103003':(3,0.4),
'0105001':(1,0.0),
'0105002':(2,1.0),
'0105003':(3,0.0)}
</code></pre>
<p>Considering that the first four digits of each key consitute the identif... | 0 | 2016-08-03T10:33:19Z | 38,741,203 | <p>Use a <a href="https://docs.python.org/2/library/collections.html#counter-objects" rel="nofollow">Counter</a>, add the first four digits of the key if the value is what you're looking for:</p>
<pre><code>from collections import Counter
counts = Counter()
for key, value in d.items():
if value[1] == 0.0:
... | 3 | 2016-08-03T10:37:45Z | [
"python",
"dictionary",
"find-occurrences"
] |
Python: count specific occurrences in a dictionary | 38,741,110 | <p>Say I have a dictionary like this:</p>
<pre><code>d={
'0101001':(1,0.0),
'0101002':(2,0.0),
'0101003':(3,0.5),
'0103001':(1,0.0),
'0103002':(2,0.9),
'0103003':(3,0.4),
'0105001':(1,0.0),
'0105002':(2,1.0),
'0105003':(3,0.0)}
</code></pre>
<p>Considering that the first four digits of each key consitute the identif... | 0 | 2016-08-03T10:33:19Z | 38,741,555 | <p>You can use a <a class='doc-link' href="http://stackoverflow.com/documentation/python/498/collections/1636/collections-defaultdict#t=201608031052568500106"><code>defaultdict</code></a>:</p>
<pre><code>from _collections import defaultdict
res = defaultdict(int)
for k in d:
if d[k][1] == 0.0:
res[k[:4]] ... | 2 | 2016-08-03T10:53:34Z | [
"python",
"dictionary",
"find-occurrences"
] |
RQ Timeout does not kill multi-threaded jobs | 38,741,173 | <p>I'm having problems running multithreaded tasks using python RQ (tested on v0.5.6 and v0.6.0).</p>
<p>Consider the following piece of code, as a simplified version of what I'm trying to achieve:</p>
<h1>thing.py</h1>
<pre><code>from threading import Thread
class MyThing(object):
def say_hello(self):
... | 1 | 2016-08-03T10:36:26Z | 38,747,032 | <p>When you run <code>t.join()</code>, the <code>hello_task</code> thread blocks and waits until the <code>say_hello</code> thread returns - thus not receiving the timeout signal from rq. You can allow the main thread to run and properly receive the timeout signal by using <code>Thread.join</code> with a set amount of ... | 1 | 2016-08-03T14:52:40Z | [
"python",
"multithreading",
"python-2.7",
"python-rq",
"django-rq"
] |
Pandas - How to rename a table name? | 38,741,177 | <p>I am trying create dynamic table names by using variable from the for loop. I am using Python 2.7.</p>
<p>This is the function I intend to write:</p>
<p>where columns can be parsed from the external sources.</p>
<p>FUNCTION: </p>
<pre><code>def cutoff(row):
if (row['CourierCode']=='DP'):
for TAT in ... | 0 | 2016-08-03T10:36:31Z | 38,742,390 | <p>In your case, if you do want to accomplish it this way use:</p>
<pre><code>exec("CombinedDataProjected%s = %s" % (month, 'pd.DataFrame(CombinedData)'))
</code></pre>
<p>But this is a very poor way of executing in python since Python has perfectly good concepts for representing a bunch of variables --- lists and di... | 1 | 2016-08-03T11:33:18Z | [
"python",
"pandas",
"dataframe",
"rename"
] |
Averaging pandas dataframes from certain columns | 38,741,288 | <p>I am new to pandas. I have several <code>dfs</code>. The data in column <code>0</code> is the <code>ID</code> and in columns <code>1-10</code> are probabilities. I want to take the column-wise average of columns <code>1-10</code> across the <code>dfs</code>. The rows may not be in the same order. </p>
<p>Is there a... | 1 | 2016-08-03T10:41:52Z | 38,741,412 | <p>It looks like need <a href="http://pandas.pydata.org/pandas-docs/stable/generated/pandas.concat.html" rel="nofollow"><code>concat</code></a> and <a href="http://pandas.pydata.org/pandas-docs/stable/generated/pandas.DataFrame.mean.html" rel="nofollow"><code>mean</code></a>:</p>
<pre><code>import pandas as pd
df1 = ... | 1 | 2016-08-03T10:47:21Z | [
"python",
"pandas",
"dataframe",
"mean",
"ensembles"
] |
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