Paul Sokolovsky eb84a830df py/runtime: Implement dispatch for "reverse op" special methods. ...

If, for class X, X.__add__(Y) doesn't exist (or returns NotImplemented),
try Y.__radd__(X) instead.

This patch could be simpler, but requires undoing operand swap and
operation switch to get non-confusing error message in case __radd__
doesn't exist.

2017-09-10 17:05:57 +03:00

55 KiB

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