What’s the working directory when using IDLE?

You can easily check that yourself using os.getcwd:

>>> import os
>>> os.getcwd()
'C:\\Program Files\\Python33'

That’s on my Windows machine, so it’s probably the installation directory of Python itself.

You can change that directory at runtime using os.chdir:

>>> os.chdir('C:\\Users\\poke\\Desktop\\')
>>> os.getcwd()
>>> with open('someFile.txt', 'w+') as f:
        f.write('This should be at C:\\Users\\poke\\Desktop\\someFile.txt now.')

This will—not surprisingly—create the file on my desktop.

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