Using map() function with keyword arguments

Here is the loop I am trying to use the map function on:

volume_ids = [1,2,3,4,5]
ip = '172.12.13.122'
for volume_id in volume_ids:
    my_function(volume_id, ip=ip)

Is there a way I can do this? It would be trivial if it weren't for the ip parameter, but I'm not sure how to deal with that.

Solution 1:

Use functools.partial():

from functools import partial

mapfunc = partial(my_function, ip=ip)
map(mapfunc, volume_ids)

partial() creates a new callable, that'll apply any arguments (including keyword arguments) to the wrapped function in addition to whatever is being passed to that new callable.

Solution 2:

Here is a lambda approach (not better, just different)

volume_ids = [1,2,3,4,5]
ip = '172.12.13.122'
map(lambda ids: my_function(ids, ip), volume_ids);

Solution 3:

This can be done easily with a list comprehension.

volume_ids = [1,2,3,4,5]
ip = '172.12.13.122'
results = [my_function(i,ip=ip) for i in volume_ids]