For me it makes sense. operator.add should be used in a "global" context (I don't know how to express it otherwise). So you provide it with the two values that you want to add. The .__add__ variants are bound to a particular instance and you provide it with a single value that you want to add.
You also need the dunder versions when you want to implement addition for user defined types. So although they are similar, I do believe they have slightly different uses. As an example, you cannot use the dunder versions for literals. >> 2.__add__(3) # Oops, does not work >> a = 2 >> a.__add__(3) 5 >> import operator >> operator.add(2,3) # Fine I also think operator.add versus .__add__ is equivalent to the global getattr() and .__getattr__. Marco -- https://mail.python.org/mailman/listinfo/python-list
