New submission from yoch:
collections.abc.Iterable don't implement the __bool__ method. This may
seriously degrade performance in case __len__ is not efficient.
I suggest to implement it as :
class Iterable:
...
def __bool__(self):
try:
next(iter(self))
return True
except StopIteration:
return False
----------
components: Library (Lib)
messages: 253690
nosy: yoch.melka
priority: normal
severity: normal
status: open
title: collections.abc.Iterable don't implement __bool__
type: enhancement
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Python tracker <[email protected]>
<http://bugs.python.org/issue25513>
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