What calls are chained?

python chained calls return the object itself can be self

Case 1 (Reference: https://blog.csdn.net/u010360990/article/details/86080012 )

class Person:
    def name(self, name):
        self.name = name
        return self
 
def age(self, age):
    self.age = age
    return self

def show(self):
    print "self.name"

p = Person()
p.name("xxx").age(11).show()

Case 2 (Reference: http://pyecharts.org/#/zh-cn/quickstart )