List Comprehension

List comprehensions are used for creating new lists from other iterables like lists, tuples, dictionaries, sets, and even in arrays and strings.

Syntax:

List = [expression(item) for item in iterable if condition]

expression: it is the item which is being iterated.

iterable: it can be list, tuples, dictionaries, sets, and even in arrays and strings.

condition: condition checks if the item should be added to the new list or not.

Example 1: accepts items with the small letter “o” in the new list

names = ["Milo", "Sarah", "Bruno", "Anastasia", "Rosa"]
namesWith_O = [item for item in names if "o" in item]
print(namesWith_O)

Output:

['Milo', 'Bruno', 'Rosa']

Example 2: accepts items which have more than 4 letters

names = ["Milo", "Sarah", "Bruno", "Anastasia", "Rosa"]
namesWith_O = [item for item in names if (len(item) > 4)]
print(namesWith_O)

Output:

['Sarah', 'Bruno', 'Anastasia']

Python