四类装饰器
一：函数装饰函数
def wrapFun(func):
def inner(a, b):
print('function name:', func.__name__)
r = func(a, b)
return r
return inner
@wrapFun
def myadd(a, b):
return a + b
print(myadd(2, 3))
二：函数装饰类
def wrapClass(cls):
def inner(a):
print('class name:', cls.__name__)
return cls(a)
return inner
@wrapClass
class Foo():
def __init__(self, a):
self.a = a
def fun(self):
print('self.a =', self.a)
m = Foo('xiemanR')
m.fun()
三：类装饰函数
class ShowFunName():
def __init__(self, func):
self._func = func
def __call__(self, a):
print('function name:', self._func.__name__)
return self._func(a)
@ShowFunName
def Bar(a):
return a
print(Bar('xiemanR'))
四：类装饰类
class ShowClassName(object):
def __init__(self, cls):
self._cls = cls
def __call__(self, a):
print('class name:', self._cls.__name__)
return self._cls(a)
@ShowClassName
class Foobar(object):
def __init__(self, a):
self.value = a
def fun(self):
print(self.value)
a = Foobar('xiemanR')
a.fun()