Just got bit by this. So if you want to override the equality operator in python the simplest thing to do is override the __eq__ method. For example:
def __init__(self, equalityprop):
self.equalityprop = equalityprop
def __eq__(self, obj):
return isinstance(obj, MyFoo) and obj.equalityprop == self.equalityprop
Then you can use the == operator and it behaves as you would expect.
MyFoo(“bar”) == MyFoo(“bop”) # False
MyFoo(“bar”) == MyFoo(“bar”) # True
What you might not realize is that this has absolutely no effect on the != operator.
MyFoo(“bar”) == MyFoo(“bop”) # True
MyFoo(“bar”) != MyFoo(“bar”) # True (!)
If you want to override != (which you probably do) you also have to override the __ne__ method. One simple thing you can do is:
def __ne__(self, obj):
return not self == obj