Author john.black.3k
Recipients NeilGirdhar, Rosuav, Yury.Selivanov, belopolsky, berker.peksag, ethan.furman, gvanrossum, john.black.3k, ncoghlan, python-dev, r.david.murray, rhettinger, schlamar, scoder, serhiy.storchaka, vstinner, yselivanov
Date 2015-10-06.20:26:24
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Message-id <1444163185.33.0.549519157891.issue22906@psf.upfronthosting.co.za>
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Content
Consider the following generator function similar to the one that started this issue:

    from __future__ import generator_stop

    def myzip(*seqs):
        its = (iter(seq) for seq in seqs)
        while True:
            try:        
                yield tuple(next(it) for it in its)
            except RuntimeError:
                return

    g = myzip('abc', 'xyz')
    print([next(g) for i in range(5)]) # prints: [('a', 'x'), (), (), (), ()]

A print(list(g)) would cause a hang.
History
Date User Action Args
2015-10-06 20:26:25john.black.3ksetrecipients: + john.black.3k, gvanrossum, rhettinger, ncoghlan, belopolsky, scoder, vstinner, r.david.murray, ethan.furman, Yury.Selivanov, python-dev, schlamar, Rosuav, berker.peksag, serhiy.storchaka, yselivanov, NeilGirdhar
2015-10-06 20:26:25john.black.3ksetmessageid: <1444163185.33.0.549519157891.issue22906@psf.upfronthosting.co.za>
2015-10-06 20:26:25john.black.3klinkissue22906 messages
2015-10-06 20:26:24john.black.3kcreate