John added the comment:
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.
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nosy: +john.black.3k
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Python tracker <[email protected]>
<http://bugs.python.org/issue22906>
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