趣味导学Python——类与对象（一）

<pre name="code" class="python">#coding:utf8  import turtle  class Things:#定义“东西”类      pass    class Inanimate(Things):#定义”非活动事物“类      pass    class Animate(Things):#定义“活动事物”类      pass    class Slidewalks(Inanimate):#定义”人行道“类      pass    class Animals(Animate):#定义”动物“类      def breathe(self):          print "breathing"            def move(self):          print "moving"            def eat_food(self):          print "eating food"    class Mammals(Animals):#定义”哺乳动物“类      def feed_young_with_milk(self):          print "feeding young"              class Giraffes(Mammals):#定义”长颈鹿“类      def __init__(self,spots):        self.giraffe_spots=spots        def find_food(self):        self.move()        print "I've found food!"        self.eat_food()            def eat_leaves_from_tree(self):          print "eating leaves"              def dance_a_jig(self):        self.move()        self.move()        self.move()        self.move()    ozwald=Giraffes(100)gertrude=Giraffes(150)print ozwald.giraffe_spotsprint gertrude.giraffe_spots'''avery=turtle.Pen()kate=turtle.Pen()avery.forward(50)avery.right(90)avery.forward(20)kate.left(90)kate.forward(100)jacob=turtle.Pen()jacob.left(180)jacob.forward(80)'''msg=raw_input("Please press Enter key over!")