18.04.18 21:45, Tim Peters пише:
(*) The obvious implementation:
def __mul__(self, other):
if isinstance(other, Sized):
raise TypeError("cannot multiply Counter by Sized type %s"
% type(other))
Wouldn't be better to return NotImplemented here?
result = Counter()
for k, v in self.items():
result[k] = v * other
return result
If discard non-positive values, this will automatically make multiplying
Counter by Counter (or by sequence) invalid, because they are not
comparable with 0.
for k, v in self.items():
v = v * other
if v > 0:
result[k] = v * other
_______________________________________________
Python-ideas mailing list
Python-ideas@python.org
https://mail.python.org/mailman/listinfo/python-ideas
Code of Conduct: http://python.org/psf/codeofconduct/
