就是几个动物，自动排列生成什么的

class Animal(object):def __init__(self,name,weight):self.name = nameself.weight = weightdef eat(self):self.weight +=1def speak(self):print ("i am a animal")def walk(self):print ("i am walking")  class Dog(Animal):def __init__(self,name,weight):Animal.__init__(self,name,weight)def eat():self.weight +=1def speak(self):print ("i am a dog")def walk(self):print ("i am walking")
class Duck(Animal):def __init__(self,name,weight):Animal.__init__(self,name,weight)def eat(self):self.weight +=1def speak(self):print ("i am a duck")def walk(self):print ("i am walking")
class Cat(Animal):def __init__(self,name,weight):Animal.__init__(self,name,weight)def eat(self):self.weight +=1def speak(self):print ("i am a dog")def walk():print ("i am walking")  #animal = Dog("Dog",24)#animal.speak()def reAnimals(zoo):string = "animal"for x in range(0,21):if x%3 ==0:animal = Dog(string+str(x),x+2)if x%3 ==1:animal = Duck(string+str(x),x)       if x%3 ==2:animal = Cat(string+str(x),x)zoo.append(animal)return zoo#zoo = [item for item in animal if item.weight <= 10 and item.weight >= 0]def filterAnimal(animal):zoo = []for x in range(0,len(animal)):if animal[x].weight<=10 and animal[x].weight>=0:zoo.append(animal[x])#animal.clear()#animal = zooreturn zooanimal = []
dongwu = []dongwu = filterAnimal(reAnimals(dongwu))for x in dongwu:x.speak()print (x.weight)#print (animal[x].weight)

改版代码：

class Animal(object):def __init__(self,name,weight):self.name = nameself.weight = weightdef eat(self):self.weight +=1def fly(self):print ("i am a animal and i can fly")def jump(self):print ("i can jump ") class Tiger(Animal):def __init__(self,name,weight):Animal.__init__(self,name,weight)def eat():self.weight +=1def fly(self):print ("i am a Tiger and i cant fly")def jump(self):print ("i can jump ")
class Bird(Animal):def __init__(self,name,weight):Animal.__init__(self,name,weight)def eat(self):self.weight +=1def fly(self):print ("i am a bird and i can fly")def jump(self):print ("i can jump ")
class Snake(Animal):def __init__(self,name,weight):Animal.__init__(self,name,weight)def eat(self):self.weight +=1def fly(self):print ("i am a snake and i cant fly")def jump(self):print ("i cant jump ") container = []
dongwu = []class Zoo(object):def filterAnimal(animal):container = []for x in range(0,len(animal)):if animal[x].weight<=10 and animal[x].weight>=0:container.append(animal[x])return containerdef reAnimals(container):string = "animal"   for x in range(0,21):if x%3 ==0:animal = Tiger(string+str(x),x+2)if x%3 ==1:animal = Bird(string+str(x),x)      if x%3 ==2:animal = Snake(string+str(x),x)container.append(animal)return container  def relax():dongwu = Zoo.filterAnimal(Zoo.reAnimals(container))for x in dongwu:x.fly()x.jump()Zoo.relax()