装饰器参数

两个参数

import time

def showtime(f):
    def inner(*x,**y):
        start = time.time()
        f(*x,**y)
        end = time.time()
        print(end - start)

    return inner

@showtime  #等价于foo = showtime(foo
def add(a,b):
    print(a+b)
    time.sleep(2)
add(2,3)

多个参数

import time

def showtime(f):
    def inner(*x,**y):
        start = time.time()
        f(*x,**y)
        end = time.time()
        print(end - start)

    return inner

@showtime  #等价于foo = showtime(foo
def add(*a,**b):
    sum = 0
    for i in a:
        sum+=i
    print(sum)
    time.sleep(2)

add(2,3,5,6,7)

装饰器参数
增加一个日志函数

import time

def logger(flag=''):
    def showtime(f):
        def inner(*x,**y):
            start = time.time()
            f(*x,**y)
            end = time.time()
            print(end - start)
            if flag=='true':
                print('日志记录')
        return inner
    return showtime

@logger('true')  #等价于foo = showtime(foo
def add(*a,**b):
    sum = 0
    for i in a:
        sum+=i
    print(sum)
    time.sleep(2)

add(2,3,5,6,7)

@logger()
def bar():
    print('bar...........')
    time.sleep(2)
bar()