https://www.zhihu.com/question/31265857
http://www.cnblogs.com/huxi/archive/2011/03/01/1967600.html
方法装饰器
def decorator(Func):
def new_Func(a, b):
print 'input:', a, b
return Func(a, b)
return new_Func
@decorator
def square_sum(a, b):
return a**2 + b**2
@decorator
def square_diff(a, b):
return a**2 - b**2
print square_sum(3, 4)
print square_diff(3, 4)
# output
input: 3 4
25
input: 3 4
-7
类装饰器
def decorator(Class):
class new_Class:
def __init__(self, age):
self.total_display = 0
self.wrapped = Class(age)
def display(self):
self.total_display += 1
print("total display", self.total_display)
self.wrapped.display()
return new_Class
@decorator
class Bird(object):
def __init__(self, age):
self.age = age
def display(self):
print("My age is", self.age)
eagleLord = Bird(5)
for i in range(3):
eagleLord.display()
# output
('total display', 1)
('My age is', 5)
('total display', 2)
('My age is', 5)
('total display', 3)
('My age is', 5)
