I can't do the questions while studying Python class. The wrong place

class myObj(object):
    def set_value(self, item):
        self.item=item

    def get_value(self):
        return self.item

    def M_calc(self):
        self.item=self.item+10
        return self.item

if __name__ == "__name__":
    result=[]
    obj=myObj()
    obj.set_value(100)
    result.append(obj)

    obj01=myObj()
    obj01.set_value(200)
    result.append(obj01)

    map(lambda item:item.M_calc(), result)
    for m_obj in result:
        print(m_obj.get_value())