Amaury Forgeot d'Arc added the comment:
This is expected. When you assign to "n.__div__" a function which takes two
parameters, you have to call it with two parameters:
aFunction = lambda x, y: (x, y)
n.__div__ = aFunction
aFunction(1, 2)
n.__div__(1, 2)
After all, aFunction and n.__div__ are the same object.
Now, it would be different if you had attached the function to the *class*
instead:
n.__class__.__div__ = aFunction
n.__div__(2) # returns (n, 2)
In this second example, n.__div__ is a bound method; the first parameter
(usually named "self") is already filled, and only the second one is required.
----------
nosy: +amaury.forgeotdarc
resolution: -> invalid
status: open -> closed
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue18474>
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