常规：
class Dog(object):
def __init__(self,name):
self.name=name def eat(self):
print('%s is eating'%self.name) d1=Dog('lele')
d1.eat()
1.静态方法：名义上由类管理，而实际在调用时，需要手动把实例对象传进去作参数
class Dog(object):
def __init__(self,name):
self.name=name
@staticmethod
def eat(self):
print('%s is eating'%self.name) d1=Dog('lele')
d1.eat(d1)
2.类方法：只能访问类变量，不能访问实例变量
class Dog(object):
name='xiaomei'
def __init__(self,name):
self.name=name @classmethod
def eat(self):
print('%s is eating'%self.name) d1=Dog('lele')
d1.eat()
实例变量name='lele'，类变量name='xiaomei'。
调用结果为：xiaomei is eating
3.属性方法：把一个方法变为一个静态属性（用途：用户只需要知道查询结果（调用属性），而复杂的实现过程不需要用户知道。eg:第三方查询航班）
class Dog(object):
def __init__(self,name):
self.name=name @property
def eat(self):
print('%s is eating'%self.name) d1=Dog('lele')
d1.eat
lele is eating
若要增加参数，可以通过 @属性方法名.setter 来实现
class Dog(object):
def __init__(self,name):
self.name=name
self.__food=None
#将一个方法变为静态属性
@property
def eat(self):
print('%s is eating %s' % (self.name,self.__food)) #更改属性方法
@eat.setter
def eat(self,food): #增加了参数
self.__food=food
print('%s is eating %s' % (self.name, self.__food))
#删除属性方法
@eat.deleter
def eat(self):
del self.__food
print('已删除') d1=Dog('lele')
d1.eat
d1.eat='gutou' #变成静态属性后，注意赋值方式
d1.eat
del d1.eat
lele is eating None
lele is eating gutou
lele is eating gutou
已删除