Python——一个简单的类的创建和应用

 1 class dog(object):
 2     """创建小狗类"""
 3     
 4     def __init__(self, name, age):
 5         """初始化参数，Python创建实例时，自动传入实参self，指向实例本身，以便访问属性和方法"""
 6         self.name = name
 7         self.age = age
 8         ‘‘‘给属性指定默认值‘‘‘
 9         self.color = ‘white‘
10     
11     def sit(self):
12         ‘‘‘访问类的属性‘‘‘
13         print(self.name.title() + ‘ is now siting.‘)
14     
15     def roll(self):
16         print(self.name.title()+ ‘ is now rolling‘)
17     
18     ‘‘‘通过方法修改属性的值‘‘‘
19     def updateColor(self,color):
20         self.color = str(color)
21         print(self.name.title()+ "‘s color is " + str(color))
22         
23 ‘‘‘Method one 通过先给参数赋值，再带入到类形参中，创建一个实例后，调用类的方法‘‘‘
24 name = input("Input your dog‘s name:\n")
25 age = input("Input your dog‘s age:\n")  
26 jacksDog = dog(name,age)
27 ‘‘‘这里调用类的方法，将实例作为参数带入类的方法‘‘‘
28 dog.sit(jacksDog)
29 dog.roll(jacksDog)
30  ‘‘‘Method one Output:
31 ************************
32  Input your dog‘s name:
33  jack
34  Input your dog‘s age:
35  10
36  Jack is now siting.
37  Jack is now rolling
38 ************************‘‘‘
39 
40 ‘‘‘Method two 原理是一样的，但是这里直接将变量通过输入来赋值‘‘‘
41 tomsDog = dog(input("Input your dog‘s name:\n"),input("Input your dog‘s age:\n"))
42 ‘‘‘这里直接调用实例的方法‘‘‘
43 ‘‘‘创建了多个实例‘‘‘
44 tomsDog.sit()
45 tomsDog.roll()
46 tomsDog.updateColor(input("what‘s your dog‘s color:\n"))
47 ‘‘‘Method two Output:
48 ************************
49  Input your dog‘s name:
50  tom
51  Input your dog‘s age:
52  9
53  Tom is now siting.
54  Tom is now rolling
55  what‘s your dog‘s color:
56  yellow
57  Tom‘s color is yellow
58 ************************‘‘‘