FreeCodeCamp

Learn Python List Comprehension

6 snippets

Replace Vowels in Each Word with * (Asterisk)

Replace all vowels in words using nested list comprehension and join.

sentence = "code with python" vowels = 'aeiou' masked = [''.join(['*' if ch in vowels else ch for ch in word]) for word in sentence.split()] print(masked) # ['c*d*', 'w*th', 'pyth*n']

Reverse Each Word in a Sentence

Reverse characters in each word using slicing inside list comprehension.

sentence = "list comprehension python" reversed_words = [word[::-1] for word in sentence.split()] print(reversed_words) # ['tsil', 'noisneherpmoc', 'nohtyp']

Filter Words by Length

Return only words longer than 4 characters using list comprehension.

sentence = "this is a list comprehension demo" filtered = [word for word in sentence.split() if len(word) > 4] print(filtered) # ['list', 'comprehension']

Toggle Case for Each Word

Flip case of each word using .swapcase() in list comprehension.

sentence = "HeLLo WoRLD" toggled = [word.swapcase() for word in sentence.split()] print(toggled) # ['hEllO', 'wOrld']

Convert Words to Title Case

Convert each word to title case using list comprehension.

sentence = "hello world from python" titled = [word.title() for word in sentence.split()] print(titled) # ['Hello', 'World', 'From', 'Python']

Convert Words to Uppercase Using List Comprehension

Use list comprehension to convert all words in a sentence to uppercase.

sentence = "hello world from python" uppercased = [word.upper() for word in sentence.split()] print(uppercased) # ['HELLO', 'WORLD', 'FROM', 'PYTHON']