Python中静态方法,类方法,属性方法使用方法

#静态方法 只是名义上归类管理，实际上在静态方法里访问不了类或实例中 的任何属性
class Dog(object):
def __init__(self,name):
self.name=name
@staticmethod #实际上跟类本身已没什么关系，只是名义上是类的方法(与类无关，不能访问类里的任何属性和方法)
def eat(self,name):
print("%s is eating %s"%(self.name,name))

d=Dog('sb')
# d.eat('baozi')#出错 原因是eat需要一个self参数，但调用时却没有传递，没错，因为当eat变成静态方法后，再通过实例调用时就不会自动把实例本身当作一个参数传给self了
#解决办法
#1.调用时主动传递实例本身给eat方法#在eat中去掉self参数，但这也意味着，在eat中不能通过self.调用实例中的其他变量了
d.eat(d,'baozi')
#执行结果
>>>sb is eating baozi

class Dog(object):
name='SB' #类变量
def __init__(self,name):
self.name=name
@classmethod #类方法只能访问类变量，不能访问实例变量
def eat(self,name):
print('%s is eating %s'%(self.name,name))
def talk(self,something):
print("%s is talking %s"%(self.name,something))
d=Dog('Lulu')
d.eat('Mantou')
#执行结果
SB is eating Mantou

class Dog(object):
name='suantou'
def __init__(self,name):
self.name=name
@property #把一个方法变成一个静态属性
def eat(self):
print('%s is eating %s'%(self.name,'something'))
@eat.setter #为eat属性赋值
def eat(self,food):
print('set to food',food)
def talk(self,something):
print("%s is talking %s"%(self.name,something))
d=Dog('Lulu')
#d.eat('baozi')出错 说NoneType is not callable, 因为eat此时已经变成一个静态属性了， 不是方法了， 想调用已经不需要加()号了，直接d.eat就可以了
d.eat
d.eat='baozi'

class Flight(object):
def __init__(self, name):
self.flight_name = name
def checking_status(self):
print("checking flight %s status " % self.flight_name)
return 1
@property
def flight_status(self):
status = self.checking_status()
if status == 0:
print("flight got canceled...")
elif status == 1:
print("flight is arrived...")
elif status == 2:
print("flight has departured already...")
else:
print("cannot confirm the flight status...,please check later")
@flight_status.setter # 修改
def flight_status(self, status):
status_dic = {
0: "canceled",
1:"arrived",
2: "departured"
}
print("\033[31;1mHas changed the flight status to \033[0m", status_dic.get(status))
@flight_status.deleter # 删除
def flight_status(self):
print("status got removed...")
f = Flight("CA980")
f.flight_status
f.flight_status = 2 # 触发@flight_status.setter
del f.flight_status # 触发@flight_status.deleter