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Non-alphanumeric list order from os.listdir()
I often use python to process directories of data. Recently, I have noticed that the default order of the lists has changed to something almost nonsensical. For example, if I am in a current directory containing the following subdirectories: run01, run02, ... run19, run20, and then I generate a list...
What is getattr() exactly and how do I use it?
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Objects in Python can have attributes -- data attributes and functions to work with those (methods). Actually, every object has built-in attributes.
For example you have an object person, that has several attributes: name, gender, etc....
Operation on every pair of element in a list
Using Python, I'd like to compare every possible pair in a list.
4 Answers
4
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How to split a column into two columns?
...rst two parameters of .str.split() do,
I recommend the docs for the plain Python version of the method.
But how do you go from:
a column containing two-element lists
to:
two columns, each containing the respective element of the lists?
Well, we need to take a closer look at the .str attrib...
Failed loading english.pickle with nltk.data.load
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I had this same problem. Go into a python shell and type:
>>> import nltk
>>> nltk.download()
Then an installation window appears. Go to the 'Models' tab and select 'punkt' from under the 'Identifier' column. Then click Download and it wil...
How to stop flask application without using ctrl-c
...API, I am curious about how to code this. I am working on Ubuntu 12.10 and Python 2.7.3.
13 Answers
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“for loop” with two variables? [duplicate]
... And who doesn't love going through indenting everything to make python happy?
– mohbandy
Sep 20 '16 at 20:06
3
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“x not in y” or “not x in y”
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You've run into a CPython peephole optimisation; a compile-time optimisation that other Python implementations such as Jython and IronPython are free to ignore or copy (it is not part of the language specification).
– Mart...
How do I split a multi-line string into multiple lines?
... empty line) better than split('\n'). Back then (2008) I was just a newbie Pythonista and grepping though my scripts now shows that I too am using splitlines() almost exclusively. I'm therefore deleting my 104-point answer (*sob...*) and will be endorsing this one instead.
– ef...
Argparse optional positional arguments?
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@dolan: Yes, + works, too. See docs.python.org/2/library/argparse.html#nargs for the details.
– Vinay Sajip
Jan 8 '13 at 23:53
2
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