On Sat, Mar 9, 2019 at 9:09 AM Benedikt Werner <1benediktwer...@gmail.com> wrote: > > This was actually quite interesting to code, thanks for the idea Jonathan! > > You can even support "magic.upper()" and "magic.real" at the same time > as well as "magic[0]": > > class MagicClass: > NO_ARG = object() > > @staticmethod > def __getattribute__(attr): > def method(x=MagicClass.NO_ARG): > if x is MagicClass.NO_ARG: > return lambda x: getattr(x, attr)() > return getattr(x, attr) > return method > > @staticmethod > def __getitem__(attr): > return lambda x: x[attr] > > magic = MagicClass() > > print(list(map(magic.upper(), ["abc", "def"]))) # ['ABC', 'DEF'] > print(list(map(magic.real, [1j, 2, 3+4j]))) # [0.0, 2, 3.0] > print(list(map(magic[0], ["abc", "def"]))) # ['a', 'd'] > > You could also use None instead of that NO_ARG thingy, because you most > likely won't want to get any attributes of None objects, but that > wouldn't produce proper errors incase you do anyways. > > With metaclasses you propably could also make it work directly on the > class without the need of a magic instance.
Rather than using map in this way, I would recommend a list comprehension: print([x.upper() for x in ["abc", "def"]]) print([x.real for x in [1j, 2, 3+4j]]) print([x[0] for x in ["abc", "def"]]) No magic needed. ChrisA _______________________________________________ Python-ideas mailing list Python-ideas@python.org https://mail.python.org/mailman/listinfo/python-ideas Code of Conduct: http://python.org/psf/codeofconduct/
