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Python Pandas merge only certain columns
...t possible to only merge some columns? I have a DataFrame df1 with columns m>x m>, y, z, and df2 with columns m>x m>, a ,b, c, d, e, f, etc.
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what does the __file__ variable mean/do?
...functions to find the directory that the file is located in.
Taking your em>x m>amples one at a time:
A = os.path.join(os.path.dirname(__file__), '..')
# A is the parent directory of the directory where program resides.
B = os.path.dirname(os.path.realpath(__file__))
# B is the canonicalised (?) direc...
How can I use Homebrew to install both Python 2 and 3 on Mac?
...an install different versions of python and choose which one you can use. Em>x m>ample:
$ pyenv install 2.7.5
You can check the versions you have installed with:
$ pyenv versions
And you can switch between python versions with the command:
$ pyenv global 3.3.1
Also you can set a python version f...
best way to preserve numpy arrays on disk
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would you be willing to provide some em>x m>ample code using these packages to save an array?
– dbliss
Apr 13 '15 at 23:36
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What is the argument for printf that formats a long?
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printf("%ld", ULONG_MAm>X m>) outputs the value as -1. Should be printf("%lu", ULONG_MAm>X m>) for unsigned long as described by @Blorgbeard below.
– jammus
Nov 12 '11 at 16:03
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How to tell bash that the line continues on the nem>x m>t line
In a bash script I got from another programmer, some lines em>x m>ceeded 80 columns in length. What is the character or thing to be added to the line in order to indicate that the line continues on the nem>x m>t line?
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What does the Subversion status symbol “~” mean?
...are right. It is a directory now without a .svn file. Any idea on how to fim>x m> that? Do I need to delete it from subversion and add it again?
– jergason
May 12 '09 at 15:47
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Is gcc 4.8 or earlier buggy about regular em>x m>pressions?
I am trying to use std::regem>x m> in a C++11 piece of code, but it appears that the support is a bit buggy. An em>x m>ample:
3 Answe...
wpf: how to show tooltip when button disabled by command?
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This goes in the m>x m>aml declaration for the object on which the tooltip will appear, i.e.: <Button ToolTipService.ShowOnDisabled="True">...
– gusmally supports Monica
Nov 4 '19 at 18:44
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Convert an enum to List
... @DCShannon please do not edit popular questions/answers and shrink em>x m>planations. While you and I understand shorthand code, newbie's need all the em>x m>tra details to associate it with their learnings.
– Jeremy Thompson
Sep 23 '14 at 9:16
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