Phyton functools.partial wants to use a positional argument as a keyword argument python functools partial example,python functools partial decorator,python functools

So I am trying to understand partial:

import functools

def f(x,y) :
    print x+y

g0 = functools.partial( f, 3 )
g0(1)

4 # Works as expected

In:

g1 = functools.partial( f, y=3 )
g1(1)

4 # Works as expected

In:

g2 = functools.partial( f, x=3 )
g2(1)

TypeError: f() got multiple values for keyword argument 'x'

The TypeError disappears if I use y as a keyword argument:

In:

g2( y=1 )

4

What causes the TypeError?

Answer:1



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