I like to see SIP support (in a class Foo) for slots like: __radd__ __rsub__ __rmul__ __rdiv__ __rtruediv__ __rfloordiv__ __rmod__ __rdivmod__ __rpow__ __rlshift__ __rrshift__ __rand__ __rxor__ __ror__ so that one can use: any_python_type binary_operator Foo_type Gerard