Python Python Loop Through List Items

List Comprehension

List comprehension offers a shorter syntax when you want to create a new list based on the values of an existing list.

Example: You want to create a list of all the fruits that has the letter "a" in the name.

Without list comprehension you will have to write a for statement with a conditional test inside:

fruits = ["apple", "banana", "cherry", "kiwi", "mango"]
newlist = []

for x in fruits:
if "a" in x:
newlist.append(x)

print(newlist)

With list comprehension you can do all that with only one line of code:

fruits = ["apple", "banana", "cherry", "kiwi", "mango"]

newlist = [x for x in fruits if "a" in x]

print(newlist)

The list comprehension is wrapped around square backets, contains one or more for statements, zero or more if statements, and returns a new list.