関連ワード:  what is function of self in python    what is purpose of self in python    what is the purpose of self in python class methods    what is the purpose of self in python classes    what is the role of self in python    what is purpose of self keyword in python    what is self in python function parameter    what is the purpose of self keyword in python classes    what is the purpose of self parameter in python    what is the purpose of self variable in python