Hi Everyone
I'm just starting to learn Python and want to define a class that represents a
set with a binary operation. In a Mathematica package I co-wrote for abstract
algebra we used the term "groupoid" and I know that this isn't the conventional
definition, but I'm using it below. I've read how to define a class and I
thought that this would work for me, as a start;
class GroupoidEAAM():
"""EAAM sense of Groupoid"""
def __init__(self,elements,fun):
self.domain=elements
self.operation=fun
def display(self):
displaystring='['
displaystring+=str(self.domain())
displaystring+=','
displaystring+=str(self.operation())
displaystring+=']'
return displaystring
When I then evaluate this:
z=GroupoidEAAM([0,1],lambda x,y:(x+y).mod(2))
I get a value for z of <__main__.GroupoidEAAM instance at 0x4cd92d8>, which
look good, I think. But then the following expressions all fail:
z.domain()
z.operation()
z.display()
I must be missing something. Any help?
Ken Levasseur
UMass Lowell
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