[Python] map Method

Posted 2020-09-06

Map

applies a function to all the items in an input_list

 

Blueprint

map(function, list_of_inputs)

　　

Most of the times we want to pass all the list elements to a function one-by-one and then collect the output. For instance:

items = [1, 2, 3, 4, 5]
squared = []
for i in items:
    squared.append(i**2)

　　

Map allows us to implement this in a much simpler and nicer way. Here you go:

 

items = [1, 2, 3, 4, 5]
squared = list(map(lambda x: x**2, items))