関連ワード:  how to increase a variable in python    how to increment a variable in python    how to change a variable in python    how to decrement a variable in python    how to increment a variable in python for loop    how to increment a variable in python by 1    how to increase a variable by 1 in python    how to change a global variable in python    how to change a variable name in python    how to change a variable type in python