Another point in favor of the change I just noticed is that int()
accept objects defining __index__ as its `base` argument:
Python 3.7.2 (default, Jan 13 2019, 12:50:01)
[Clang 10.0.0 (clang-10001145.5)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> class MyInt:
... def __index__(self):
... return 4
...
>>> int("3", base=MyInt())
3
>>> int(MyInt())
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: int() argument must be a string, a bytes-like object or
a number, not 'MyInt'
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