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Special cases in iterable unpacking #2585

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scoder opened this Issue Aug 28, 2018 · 0 comments

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scoder commented Aug 28, 2018

These came up in CPython issue 34508. We should make sure that we support them as well, and follow whatever they decide over there.

    def f(): return *(1, 2), 3

    eval('*(1, 2), 3')

    a = []; a += *(1, 2), 3

    for i in *(1, 2), 3: pass

    def g(): yield *(1, 2), 3
  1. write tests and find out if they work or not, see the extended_unpacking tests.
  2. find the places in the parser (Parsing.py) where these are disallowed, see the hacker guide
  3. fix the parsing issues, find out what else is not working for whatever reason.

Don't hesitate to submit an incomplete PR and ask for further guidance.

@scoder scoder added help wanted good first issue Python Semantics labels Aug 28, 2018

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