Message384527
Thanks, for the replies, didn't know about that.
Interesting thing that `collections.abc.Set` base class has implementations of `__and__`, `__or__`, `__sub__` and `__xor__` methods, it also provide `_from_iterable` class method that is used to create `Set` instance from iterable (all of those operators use this method).
```
class Set(Collection):
...
@classmethod
def _from_iterable(cls, it):
'''Construct an instance of the class from any iterable input.
Must override this method if the class constructor signature
does not accept an iterable for an input.
'''
return cls(it)
```
Basically, my proposition was to do smth similar to `collections.abc.Mapping`, but I understand your motivation not to implement this feature. |
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Date |
User |
Action |
Args |
2021-01-06 17:49:54 | uriyyo | set | recipients:
+ uriyyo, gvanrossum, brandtbucher |
2021-01-06 17:49:54 | uriyyo | set | messageid: <1609955394.42.0.565722655807.issue42841@roundup.psfhosted.org> |
2021-01-06 17:49:54 | uriyyo | link | issue42841 messages |
2021-01-06 17:49:54 | uriyyo | create | |
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