Raphael Michel added the comment:
Well, I could think of a way to still use repeat() here that also is pretty
clean except for the fact that it fails if all inputs to zip_longest are
repeat() iterators themselves (which would here lead to an empty iterator while
it would otherwise lead to an infinite one):
def zip_longest(*args, **kwds):
# zip_longest('ABCD', 'xy', fillvalue='-') --> Ax By C- D-
fillvalue = kwds.get('fillvalue')
iterators = [iter(it) for it in args]
while True:
values = []
for i, it in enumerate(iterators):
try:
values.append(next(it))
except StopIteration:
values.append(fillvalue)
iterators[i] = repeat(fillvalue)
if all(isinstance(it, repeat) for it in iterators):
break
else:
yield tuple(values)
Keeping chain() in use here just for the sake of using it is not worth it, I
believe.
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue31270>
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