On Sun, Dec 19, 2010 at 1:31 AM, Kornél JAHN <corn...@gmail.com> wrote: > Hello, > I have been experiencing strange behavior regarding overloaded operators for > cdef classes, using Cython 0.14. I think it can be regarded as a bug. See > the example code below: > # File: opoverload.pyx > class Test1: > def __rmul__(self, other): > print "Calling Test1.__rmul__() with", type(self), type(other) > def __mul__(self, other): > print "Calling Test1.__mul__() with", type(self), type(other) > cdef class Test2: > def __rmul__(self, other): > print "Calling Test2.__rmul__() with", type(self), type(other) > def __mul__(self, other): > print "Calling Test2.__mul__() with", type(self), type(other) > Python console: >>>> from opoverload import * >>>> Test1() * 2.0 > Calling Test1.__mul__() with <type 'instance'> <type 'float'> >>>> 2.0 * Test1() > Calling Test1.__rmul__() with <type 'instance'> <type 'float'> >>>> Test2() * 2.0 > Calling Test2.__mul__() with <type 'opoverload.Test2'> <type 'float'> >>>> 2.0 * Test2() > Calling Test2.__mul__() with <type 'float'> <type 'opoverload.Test2'> > Test2.__rmul__() should be called and type(self) should not become float!
Have you read http://docs.cython.org/src/userguide/special_methods.html ? > Can you please suggest a temporary workaround? Manually check the types in your arithmetic functions. (Yes, I know that's not as nice as it could be, it's just a reflection of the underlying C API that we haven't glossed over.) - Robert _______________________________________________ Cython-dev mailing list Cython-dev@codespeak.net http://codespeak.net/mailman/listinfo/cython-dev
