関連ワード:  how to check string value in python    how to compare string value in python    how to find string value in python    how to check if value is string in python    how to check if a string contains a value in python    how to check if a string value is null in python    how to check if a string has a value in python    how to check if a string value is an integer in python    how to check if value is string or number in python    how to check if a value is string or not in python