Python classes/ code understanding

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I recently downlaoded a game on pydev.org. The code below is the code that you run for the game to play. My question is does the likes of

os.path.dirname(__file__)

mean? I have created games in python before but i always made them in the one class. Where as in this game this is outside of the folder where all the other classes are?

Can any1 help me. I have researched this but to no luck!

import sys
import os


try:
    __file__
except NameError:
    pass
else:
    libdir = os.path.abspath(os.path.join(os.path.dirname(__file__), 'lib'))
    sys.path.insert(0, libdir)

sys.path.insert(1, "lib")
import main
main.main()

Posted 1-Feb-12 3:53am

richieg999

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Manfred Rudolf Bihy · Answer 1 · 2012-02-01T05:06:00

os.path.dirname(path)[^] is a function that will return the path to a file where the parameter given is the complete path including the file and an optional extension.
__file__ (see here for instance: http://docs.python.org/library/runpy.html[^]) is a special global variable that will give the file name of the file that contains the momentarily executed code. So if you use this variable in your code it will give you the file name that contains the instructions you wrote.

So the construct in question will give you the path only of the file containing the momentarily executed instructions.

Regards,

Manfred