To get the common letters in two words without repetition

Question

Write the function getCommonLetters(word1, word2) that takes in two words as arguments and returns a new string that contains letters found in both string. Ignore r

Answer 1

you can use set() and set intersection to find the common elements of two sets -

def getCommonLetters(word1, word2):
    return ''.join(sorted(set(word1) & set(word2)))

& is for set intersection .

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Example/Demo -

>>> def getCommonLetters(word1, word2):
...     return ''.join(sorted(set(word1) & set(word2)))
...
>>> getCommonLetters('apple','google')
'el'
>>> getCommonLetters('microsoft','apple')
''