Serhiy Storchaka <storchaka+cpyt...@gmail.com> added the comment: Adding as_integer_ratio() to numbers.Rational is a breaking change. It breaks the interface. Currently all numbers.Rational subclasses implement all public methods and properties of the abstract class, but with adding as_integer_ratio() this will be no longer true.
>>> issubclass(numpy.int64, numbers.Rational) True >>> numpy.int64.as_integer_ratio Traceback (most recent call last): File "<stdin>", line 1, in <module> AttributeError: type object 'numpy.int64' has no attribute 'as_integer_ratio' I suggest to make as_integer_ratio() creating an implicit interface (as write() creates an implicit interface for writable file-like objects), and add a convenient function (in the numbers or the math module) which calls this method if it exists and falls back to the (nominator, denominator) pair otherwise. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue33073> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
