関連ワード:  how to push element in set in python    how to add element in set in python    how to insert element in set in python    how to add elements in set in python using for loop    how to add item in set in python    how to add new element in set in python    python add element to empty set    how to add multiple elements in set in python    how to add and remove elements in set in python    how to add list elements to set in python