class Person:    def name(self, name):        self.name = name        return self    def age(self, age):        self.age = age        return self    def show(self):        print("My name is", self.name, "and I am", self.age, "years old.")
p = Person()p.name("Li Lei").age(15).show()

输出：My name is Li Lei and I am 15 years old.