Ronald Oussoren added the comment:
Create a class with a __getitem__ method but no __iter__:
class Seq (object):
def __len__(self):
return 5
def __getitem__(self, idx):
if idx > len(self):
raise IndexError(idx)
return idx * 2
i = iter(Seq())
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nosy: +ronaldoussoren
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<http://bugs.python.org/issue17932>
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