Python map and filter function

Python provides map and filter functions to process computations on the list of items. Here is a list of examples how to use map and filter.

Python map function examples

Compute the square of 1 to 10

def f(x):
    return x*x

map(f, range(1, 11))

or use lambda functions

map(lambda x: x*x, range(10)) 

Python filter function examples

Extract the event numbers from 1 to 10

def f(x):
    return x%2 == 0

filter(f, range(1, 11))

or use lambda functions

filter(lambda x: x%2 == 0, range(1, 11))