関連ワード:  how to get a substring in python    how to make a substring in python    how to extract a substring in python    how to get sub string in python    how to get a substring from string in python    how to get index of a substring in python    how to get all substrings in python    how to get a substring before a character in python    how to get the position of a substring in python    how to extract substring in python using regex