Python代码改写

以下是全部代码，换一种程序，运行结果相同，如何改写？
class People():
def init(self,name,nationality):
self.name=name
self.nationality=nationality

   def talk(self):
       print('Communicate in language')

   def walk(self):
         print('Walk on two legs')

class Ch_people(People):
def init(self,name,nationality,nation):
self.name=name
self.nationality=nationality
self.nation=nation
def talk(self):
print('Exchange ideas with national language!')

peopA=People('Zong da hua','china')
print(peopA.name,peopA.nationality)
peopA.talk()
peopA.walk()

peopB=Ch_people('Zong da hua','china','Chinese')
print(peopB.name,peopB.nationality,peopB.nation)
peopB.talk()
peopB.walk()

init跟people类相同，然后加一个def setNation（nation）：self.nation = nation