On Dec 28, 9:11 am, kent-and <[EMAIL PROTECTED]> wrote:
> class Foo: > > def __init__(self): > self.field = 1.0 > > def __mul__(self, other): > print "Multiplication in Foo from right" > self.field = self.field * other > > def __rmul__(self, other): > print "Multiplication in Foo from left" > self.field = other * self.field > > f = Foo() > > f*x # works > x*f # works > > f*y # works > y*f # does not work > > What should I do about this ? Try deriving Foo from sympy.Basic. Actually the __mul__ code in sympy is broken as it should return NotImplemented when it gets an unknown (to sympy) object as an right hand side. Btw, arithmetic operations in sympycore are about 4x faster than in sympy and I am currently working on sexpr support (based on Fredrik's research) which should give speedups upto 10x in arithmetic operations. HTH, Pearu --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "sympy" group. To post to this group, send email to sympy@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sympy?hl=en -~----------~----~----~----~------~----~------~--~---
