Operators are methods

About this app

Which method does a * b call? A flow diagram shows the two stations a.__mul__(b) and b.__rmul__(a) with the exits result, NotImplemented and error. With numbers, strings, lists, fractions in four stages (isinstance, __rmul__, __eq__) and runs with and without __lt__: why 3 * Bruch(1, 2) first fails at the int and then ends up in __rmul__.

Subject: Computer science

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