One of the biggest pains of having to deal with python development in Windows is using the right runtime when running your script. Many scripts will run fine in the python interpreter bundled with Cygwin, but many require the official Python build for windows which understands paths etc correctly.

The problem then, is executing the right interpreter. It quickly becomes tiring to manually type

cmd /c C:\\Python25\\python.exe myscript.py arg1 arg2 arg3

.. for every time you want to invoke a script. Furthermore, it becomes very tedious when you start using bash tab completion for paths, only to discover windows python doesn’t understand cygwin paths. So you start having to use cygpath, or worse hard-coding all your paths:

cmd /c C:\\Python25\\python.exe myscript.py  `cygpath -w ~/some_relevant_file.txt`
#or
cmd /c C:\\Python25\\python.exe myscript.py C:\\Users\\marshall\\some_relevant_file.txt

To solve this problem, I’ve written a small shell wrapper that auto-converts any unix style paths, and calls into python.exe directly. Feel free to use this for your own environment (download here):

#!/bin/sh

PYTHONHOME=C:\\Python25
newargs=
while [ $# -ne 0 ]; do
    arg=$1
    index=`expr index "$arg" '/' | tr -d '\n'`
    if [ "$index" -ne "0" ]; then
        # convert to windows path
        newarg=`cygpath -w "$arg" | tr -d '\n'`
        newargs="$newargs \"$newarg\""
    else
        newargs="$newargs \"$arg\""
    fi
    shift
done

command="cmd /c \"$PYTHONHOME\\python.exe\" $newargs"
eval $command

You’ll need to set PYTHONHOME to your windows python directory. Save the script as /usr/bin/python (move the current /usr/bin/python to /usr/bin/python_cyg or something similar), and you should be able to use #!/usr/bin/python in any of your python scripts, and execute them just like any other executable. For reference, now I can do:

./myscript.py ~/some_relevant_file.txt

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