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Reverse / invert a dictionary mapping
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For Python 2.7.x
inv_map = {v: k for k, v in my_map.iteritems()}
For Python 3+:
inv_map = {v: k for k, v in my_map.items()}
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Understanding slice notation
I need a good explanation (references are a plus) on Python's slice notation.
33 Answers
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Multiple constructors in python? [duplicate]
Is it not possible to define multiple constructors in Python, with different signatures? If not, what's the general way of getting around it?
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How to find if directory exists in Python
In the os module in Python, is there a way to find if a directory exists, something like:
13 Answers
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Python argparse: Make at least one argument required
I've been using argparse for a Python program that can -process , -upload or both:
11 Answers
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Daemon Threads Explanation
In the Python documentation
it says:
7 Answers
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How to enumerate a range of numbers starting at 1
I am using Python 2.5, I want an enumeration like so (starting at 1 instead of 0):
12 Answers
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Add string in a certain position in Python
Is there any function in Python that I can use to insert a value in a certain position of a string?
8 Answers
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How can I remove a trailing newline?
What is the Python equivalent of Perl's chomp function, which removes the last character of a string if it is a newline?
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How do I remove the “extended attributes” on a file in Mac OS X?
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Because the errors drove me nuts too...
On a mac if you install xattr in python, then your environment may have an issue.
There are two different paths on my mac for xattr
type -a xattr
# xattr is /usr/local/bin/xattr # PYTHON Installed Version
# xattr is /usr/bin/xattr ...