関連ワード:  what is the index method in python    what is the index function in python    what is the use of index method in python    what is the purpose of the index method in python when working with list    what is the use of index function in python    what does the index function in python do    what is the difference between find and index methods in python    what is the time complexity of index function in python    what is the role of the function index in python    how to count index in python