30-seconds-of-code/snippets/count_vowels.md

count_vowels

Retuns number of vowels in provided string.

Use a regular expression to count the number of vowels (A, E, I, O, U) in a string.

import re

def count_vowels(str):
    return len(re.findall(r'[aeiou]', str, re.IGNORECASE))

count_vowels('foobar') # 3
count_vowels('gym')# 0