関連ワード:  how to create nested loop in python    how to use nested loop in python    how to use nested while loop in python    how to create a nested while loop in python    how to create nested list using for loop in python    how to make nested if statements in python    how to use nested if statements in python    how to use break in nested loop python    how to use nested for loop in list comprehension python    how to use continue in nested loop python