Suppose that a new-style class wants to overload "*" and it
defines two methods like this:
class Foo(object):
def __mul__(self,other):
print "__mul__"
def __rmul__(self,other):
print "__rmul__"
Python-2.2.1, if you try this, you get the following behavior:
>>> f = Foo()
>>> f*1.0
__mul__
>>> 1.0*f
__rmul__
>>> f*1
__mul__
>>> 1*f
__mul__
So here is the question: Why does the last statement in this example
not invoke __rmul__? In other words, why do "1.0*f" and "1*f" produce
different behavior. Is this intentional? Is this documented someplace?
Is there a workaround? Or are we just missing something obvious?
Cheers,
Dave
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