This method gets vowels (‘a’, ‘e’, ‘i’, ‘o’, ‘u’) found in a string.
#make a function:
#return is the keyword which means function have to return value:
return [each for each in string if each in 'aeiou']
#assign the words and function will return vowels words.
get_vowels('foobar') # ['o', 'o', 'a']
get_vowels('gym') #