関連ワード:  what is self in python class method    what is the purpose of self in python class methods    what is the self parameter in python class methods    what is the self keyword in python class methods    what is the purpose of self parameter in python class methods    what is the purpose of self keyword in python class methods    what does self refer to in python class methods    what is the significance of the self parameter in python class methods    what is the purpose of using self in a python class method    question 1 what is the purpose of the self parameter in python class methods