[issue20443] __code__. co_filename should always be an absolute path

[Michel Desmoulin]

Michel Desmoulin <desmoulinmichel at gmail.com> added the comment:

Isn't that change breaking compat ?

I'm assuming many scripts in the wild sys.argv[0] and play with it assuming it's relative. 

I would expect such a change to be behind a flag or a __future__ import.

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nosy: +Michel Desmoulin

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<https://bugs.python.org/issue20443>
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