To go back to your original message:

> I think it would be very usefull to add a curry function to the functools module.

For what use cases?

> Curried functions could be used as follow.
>>> adder(2, 3, 4)
>>> adder(2, 3)(4)
>>> adder(2)(3)(4)
>>> adder(z = 4)(2, 3)  # etc, etc, etc...

I don’t know the curry concept from other languages, but I’m experienced with Python and don’t like this idea at all.  A function returns something; the returned value being callable or not is a property of that value, not of the function.  The examples above look confusing to me.

I think you should discuss your use cases on the python-ideas mailing list.