Applying map for partial argument

Question

Given the following function f with two arguments, what is the standard way to apply map to only x?

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

More specifically, I would like to perform the following operation with map in one line.

list=[1,2,3]
fixed=10
for s in list:
    f(s,fixed)

One way to do so is:

import functools
map(functools.partial(lambda x,y:f(y,x),fixed),list)

What is a better way?

Answer 1

First of all, there is no need to use lambda AND partial - they are alternatives:

map(lambda x:f(x,fixed),srclist)

Secondly, you could just bind the second argument with partial, as long as you know the argument's name:

map(functools.partial(f,y=fixed),srclist)

Alternatively, use a list comprehension:

[f(x, fixed) for x in srclist]

Answer 2

What's wrong with:

def add(x, y):
    return x + y

l = [1, 2, 3]

from functools import partial
plus10 = map(partial(add, y=10), l)
print plus10

## [11, 12, 13]