类属性
1.类属性
类属性又称为静态变量，或者是静态数据。这些数据是与它们所属的类对象绑定的，不依赖于任何类实例。
2.增 删 改 查
class zoo:
country = 'china'
def __init__(self,name,address,kind):
self.name = name
self.address = address
self.kind = kind
def monkey(self):
print('this is monkey (%s)' %self.address)
def tiger(self):
print('this is tiger (%s)' %self.kind)
def end(self):
print('welcome to %s' %self.name)
dwy = zoo('chinese\'s zoo','beijing','others') zoo.monkey(dwy)
zoo.tiger(dwy)
zoo.end(dwy) # 对类的数据属性增 删 改 查 print(zoo.country) # 查看信息 zoo.country = 'US' # 修改信息
print(zoo.country) zoo.snake = 'this is snake' # 增加
print(dwy.snake) del zoo.country # 删除
del zoo.snake print(zoo.__dict__)
运行结果：
this is monkey (beijing)
this is tiger (others)
welcome to chinese's zoo
china
US
this is snake
{'__module__': '__main__', '__init__': <function zoo.__init__ at 0x7fb30efb8d90>, 'monkey': <function zoo.monkey at 0x7fb30efb8f28>, 'tiger': <function zoo.tiger at 0x7fb30efc9048>, 'end': <function zoo.end at 0x7fb30efc9378>, '__dict__': <attribute '__dict__' of 'zoo' objects>, '__weakref__': <attribute '__weakref__' of 'zoo' objects>, '__doc__': None} Process finished with exit code 0
3.
class zoo:
country = 'china'
def __init__(self,name,address,kind):
self.name = name
self.address = address
self.kind = kind
def monkey(self):
print('this is monkey (%s)' %self.address)
def tiger(self):
print('this is tiger (%s)' %self.kind)
def end(self):
print('welcome to %s' %self.name)
dwy = zoo('chinese\'s zoo','beijing','others') # 调用
zoo.monkey(dwy)
zoo.tiger(dwy)
zoo.end(dwy) # 类的函数属性的增加 def eat(self,food):
print('%s 正在吃%s'%(self.name,food))
zoo.eat = eat
print(zoo.__dict__) # 以列表的方式 查看是否添加进去了 dwy.eat('草')
运行结果：
this is monkey (beijing)
this is tiger (others)
welcome to chinese's zoo
{'__module__': '__main__', 'country': 'china', '__init__': <function zoo.__init__ at 0x7f90cdc3ed90>, 'monkey': <function zoo.monkey at 0x7f90cdc3ef28>, 'tiger': <function zoo.tiger at 0x7f90cdc4f048>, 'end': <function zoo.end at 0x7f90cdc4f378>, '__dict__': <attribute '__dict__' of 'zoo' objects>, '__weakref__': <attribute '__weakref__' of 'zoo' objects>, '__doc__': None, 'eat': <function eat at 0x7f90cdd49268>}
chinese's zoo 正在吃草 Process finished with exit code 0