5 Aug
2020
5 Aug
'20
12:11 p.m.
On Wed, Aug 5, 2020 at 2:03 PM Ricky Teachey
And btw this works:
class const(int): ... def __new__(cls, name, val): ... obj = super().__new__(cls, val) ... obj.name = name ... return obj ... def about(self): ... print(self.name, '=', self) ... a = const('a', 5) a 5 a.about() a = 5
That's literally useless, because after running that there is nothing stopping you from doing:
a = 10
or even:
a = "python has no constants"
And now a has a value different from 5. There is nothing even remotely resembling const-ness to that class. In order to get const-ness, you would need the ability to overload assignments, like C++ can do. And Python can't do that, and that's probably a good thing.