24.05.2017 07:57

# Python Maps Tutorial

Author: Elliot Forbes | @Elliot_F

This tutorial was built using Python 3.6

Maps in Python are syntactic sugar that allow you to very succinctly iterate through every element of an array and perform a function on it.

Imagine we started off with a list of values numbering from 2-6 like so:

``````values = [2,3,4,5,6]
``````

And we had a function which doubled said values:

``````def double(x):
return x * 2
``````

With the use of maps we would have to do something like so in order to multiply every element:

``````for value in values:
value = double(value)
``````

but with maps we can be far more succinct:

``````results = list(map(double, values))
``````

### Complete Example

Below you’ll find a complete exmaple for a simple map which applies the double function to every element in the values array.

``````values = [2,3,4,5,6]

def double(x):
return x * 2

results = list(map(double, values))
print(results)
``````

this produces the following output:

``````[4, 6, 8, 10, 12, 14, 16]
``````