関連ワード:  how to check for a string in python    how to check for a substring in python    how to search for a string in python    how to check for digits in a string in python    how to check for a substring in a string python    how to check for a string in a list python    how to check for numbers in a string in python    how to check for vowels in a string in python    how to check for spaces in a string in python    how to check for empty string in python