Random Python Learning : partial

On the holiday I decided to learn more on python, and really there is much to learn!!!!!!

One of the module I learn about is the functools module. 

One of the interesting function that I learn is partial, basically it is partial application of a function

for example

import functools

def adder(a,b,c):
    return a+b+c

def adder2(a,b):
    return a+b

add_three = functools.partial(adder,1,2)
add_one = functools.partial(adder2,1)

print add_three(1)
# would print 4

print add_four(3)
# would print 6

So you can wrap a existing without rewriting it, but give some default value to the existing function. And is actually used in python decorators.

read more here
http://docs.python.org/library/functools.html