関連ワード:  what is a self parameter in python    what is a self argument in python    what is self parameter in python function    what is self parameter in python oop    what is the self parameter in python class methods    what is the use of self parameter in python    what is the purpose of self parameter in python    what is the purpose of self parameter in python class methods    what is the purpose of self parameter in python class    what is the purpose of the self parameter in python methods