[issue20739] PEP 463 (except expression) implementation

[Chris Angelico]

Chris Angelico added the comment:

One test failing, due to Tools/parser/unparse.py not knowing how to unparse an except expression. Otherwise, test suite passes (with most of the stdlib unchanged). I'm about to try writing an actual conversion script which will rewrite the stdlib, and then see how much of the test suite still passes. (For this, I'll be doing only the easiest/simplest translations - the ones that involve simple or augmented assignment, and return statements - and I'll ignore PEP 8.)

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Added file: http://bugs.python.org/file34245/unparse_exceptexpr.diff

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