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How do I select elements of an array given condition?
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@ru111 It works on Python 3.6 too (there is no reason for it to stop working).
– jfs
Dec 7 '17 at 20:13
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Large, persistent DataFrame in pandas
I am exploring switching to python and pandas as a long-time SAS user.
6 Answers
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How to express a One-To-Many relationship in Django
...E)
if we want to get the list of wheels of particular car. we will use python's auto generated object wheel_set. For car c you will use c.wheel_set.all()
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Where are an UIWebView's cookies stored?
... the .binarycookies directly, you can run a script:
Download and install Python
Download BinaryCookieReader.py
Run "Python BinaryCookieReader.py" on the terminal
as you can see, output log contains detail cookies description
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Build an ASCII chart of the most commonly used words in a given text [closed]
...OUNT(*)C
INTO # FROM(SELECT DISTINCT R,(SELECT''+L FROM #D WHERE R=b.R FOR XML PATH
(''))W FROM #D b)t WHERE LEN(W)>1 AND W NOT IN('the','and','of','to','it',
'in','or','is')GROUP BY W ORDER BY C SELECT @F=MIN(($76-LEN(W))/-C),@=' '+
REPLICATE('_',-MIN(C)*@F)+' 'FROM # SELECT @=@+'
|'+REPLICATE(...
How can I get the current screen orientation?
...tween what to load in portrait vs. landscape. I already have a layout-land xml that is handling my layout.
9 Answers
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How do I get the path of a process in Unix / Linux
...ath /proc to get the folder you hopefully need.
Here's a short example in Python:
import os
print os.path.join('/proc', str(os.getpid()))
Here's the example in ANSI C as well:
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
int
main(in...
Subprocess changing directory
...g cd .. in a child shell process using subprocess won't change your parent Python script's working directory i.e., the code example in @glglgl's answer is wrong. cd is a shell builtin (not a separate executable), it can change the directory only in the same process.
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Using Emacs as an IDE
...npages, info manuals, and Elisp documentation from within emacs
Looking up Python documentation from within Emacs.
Google searching will no doubt reveal further examples.
As the second link shows, looking up functions (and whatever) in other documentation can be done, even if not supported out ...
Creating dataframe from a dictionary where entries have different lengths
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In Python 3.x:
import pandas as pd
import numpy as np
d = dict( A = np.array([1,2]), B = np.array([1,2,3,4]) )
pd.DataFrame(dict([ (k,pd.Series(v)) for k,v in d.items() ]))
Out[7]:
A B
0 1 1
1 2 2
2 NaN 3
3 N...