Serhiy Storchaka <[email protected]> added the comment:
PR 9445 is an implementation of this idea. For simplicity and for reducing
affect on tests no deprecation warning is raised, and there is no validation of
the type of argument for old classes. Num('123') will just return
Constant('123') without errors and warnings. isinstance(Constant('123'), Num)
will return False, and isinstance(Constant('123'), Str) will return True.
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<https://bugs.python.org/issue32892>
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