这个比较复杂
def before(func): #定义装饰器 def wrapper(*args, **kwargs): print(‘Before function called.‘) return func(*args, **kwargs) return wrapper def after(func): #定义修装饰器 def wrapper(*args, **kwargs): result = func(*args, **kwargs) print(‘After function called.‘) return result return wrapper @before @after def test(*args,**kwargs): #同时使用两个装饰器装饰函数 print(args) test(123) # 调用被装饰的函数 print(test(123))
多个装饰器装饰一个函数
# 带参数的装饰器：（相当于开关）为了给装饰器传参
F = True # 为True时就加上装饰器
# F = False # 为False时就去掉装饰器
def outer(flag):
def wrapper(func):
def inner(*args, **kwargs):
if flag:
print(‘before‘)
ret = func(*args, **kwargs)
print(‘after‘)
else:
ret = func(*args, **kwargs)
return ret
return inner
return wrapper
@outer(F) # outer(F) = wrapper -> @wrapper -> f1 = wrapper(f1)
def f1():
print(‘in f1‘)
@outer(False) # outer(F) = wrapper -> @wrapper -> f2 = wrapper(f2)
def f2():
print(‘in f2‘)
f1()
f2()
print(f1())
import time def door(func): def wapper(): start_time=time.time() func() time.sleep(3) stop_time=time.time() print(abs(start_time-stop_time)) return wapper @door def test1(): print(‘in the test1:‘) test1()
简单的装饰器 test1=door(test1)
import time
def foo(func):
def wapper(*args,**kwargs):
print(args,end=‘‘)
func(*args)
print(kwargs)
return wapper
@foo #test=foo(test)
def test(*args):
print(‘in test 1:‘,args)
test(123,456,s=‘袁珂‘)
带参函数
原文：https://www.cnblogs.com/yuanke98/p/9193425.html