类
1 # class Chinese(object): 2 class Chinese: 3 ''' 4 类的说明性文档 5 ''' 6 pass 7 8 print(Chinese) # <class '__main__.Chinese'> 9 10 # 类的实例化：类名+小括号，到底做了什么？ 11 p1 = Chinese() 12 print(p1) # <__main__.Chinese object at 0x0568C2B0>
类的属性操作
1 class Chinese: 2 country = 'China' 3 def __init__(self,name): 4 self.name = name 5 def play(self): 6 print("玩耍") 7 def sing(self): 8 print("唱歌") 9 10 print(Chinese) # <class '__main__.Chinese'> 11 # 打印类的数据字典 12 print(Chinese.__dict__) 13 14 #################——数据属性——###################### 15 # 查看 16 print(Chinese.country) # China 17 # 修改 18 Chinese.country = '中国' 19 print(Chinese.country) # 中国 20 # 增加 21 Chinese.dang = '党' 22 print(Chinese.dang) 23 # 删除 24 # print(Chinese.__dict__) 25 del Chinese.dang 26 # 打印类的数据字典 27 # print(Chinese.__dict__) 28 29 #################——函数属性——###################### 30 def eat(self): 31 print("吃吃吃") 32 def eat123(self): 33 print("吃吃吃123") 34 # 增加 35 Chinese.eat = eat 36 # 查看 37 print(Chinese.eat) # <function eat at 0x04D0C8E8> 38 # 打印类的数据字典 39 # print(Chinese.__dict__) 40 # 修改 41 Chinese.eat = eat123 42 print(Chinese.eat) # <function eat123 at 0x04DEC810> 43 # 删除 44 del Chinese.eat 45 # print(Chinese.__dict__)
实例的属性操作
1 class Chinese: 2 country = 'China' 3 def __init__(self,name): 4 self.name = name 5 def play(self): 6 print("玩耍") 7 def sing(self): 8 print("唱歌") 9 10 p1 = Chinese('yuan') 11 print(p1) # <__main__.Chinese object at 0x05079CD0> 12 # 打印实例的数据字典【即init中的】 13 print(p1.__dict__) # {'name': 'yuan'} 14 15 #################——数据属性——###################### 16 # 查看 17 print(p1.name) # yuan 18 # 增加 19 p1.age = 18 20 print(p1.age) # 18 21 # 打印实例的数据字典 22 print(p1.__dict__) # {'name': 'yuan', 'age': 18} 23 24 #不要修改底层的属性字典 25 # p1.__dict__['sex']='male' 26 # print(p1.__dict__) 27 # print(p1.sex) 28 29 # 修改 30 p1.age = 23 31 print(p1.age) # 23 32 print(p1.__dict__) # {'name': 'yuan', 'age': 23} 33 # 删除 34 del p1.age 35 print(p1.__dict__) # {'name': 'yuan'} 36 37 #################——函数属性——###################### 38 # 实例没有函数属性 39 # 类的属性修改会直接体现到实例 40 41 def eat(self): 42 print("吃吃吃") 43 # 增加 44 p1.eat = eat 45 # 查看【忘记吧】 46 # p1.eat("###") # 容易出错 47 # p1.eat(p1)
类与实例
1 country = "中国****" 2 class Chinese: 3 country = 'China' 4 def __init__(self,name): 5 self.name = name 6 print("--->", country) # ---> 中国**** 7 def play(self): 8 print("玩耍") 9 def sing(self): 10 print("唱歌") 11 12 p1 = Chinese('yuan') 13 # 打印实例的数据字典 14 print(p1.__dict__) # {'name': 'yuan'} 15 # 【当实例的数据字典没有时】访问类的数据字典 16 print(p1.country) 17 18 p1.country = "中国" 19 # 打印实例的数据字典 20 print(p1.__dict__) # {'name': 'yuan', 'country': '中国'} 21 # 访问实例的数据字典 22 print(p1.country) # 中国 23 24 # 访问类的数据字典 25 print(Chinese.country) # China 26 # 初始化时【country与p1.country、Chinese.country的区别】 27 p2 = Chinese('Lucy') # 初始化时
