gh-77465: Increase test coverage for numbers

[aisk]

Most classes in numbers are ABCs, but they have default implementations for some methods, for example, Complex.__bool__. Although the impementations are simple, but they should have been tested.

• Issue: Increase test coverage for numbers.py #77465

[serhiy-storchaka]

There is too many code for implementing methods that are not used, just to allow instantiation of the subclass of an abstract class. I suggest to generate them.

import abc

def not_implemented(*args, **kwargs):
    raise NotImplementedError

def concretize(cls):
    for name in dir(cls):
        try:
            value = getattr(cls, name)
            if value.__isabstractmethod__:
                setattr(cls, name, not_implemented)
        except AttributeError:
            pass
    abc.update_abstractmethods(cls)
    return cls

You can just apply this decorator to subclasses and remove all dummy methods.

[aisk]

Thanks for the review, applied!

[serhiy-storchaka]

LGTM.

[miss-islington-app]

Thanks @aisk for the PR, and @serhiy-storchaka for merging it 🌮🎉.. I'm working now to backport this PR to: 3.11, 3.12.
🐍🍒⛏🤖

[bedevere-app]

GH-114556 is a backport of this pull request to the 3.12 branch.

[bedevere-app]

GH-114557 is a backport of this pull request to the 3.11 branch.