程式碼：

import time

def timer(func): #timer(test1) func=test1
    def deco(*args,**kwargs):
        start_time=time.time()
        func(*args,**kwargs)
        end_time=time.time()
        print("the fun run time is %s"%(end_time-start_time))
    return deco

@timer #test1=timer(test1)
def test1():
    time.sleep(3)
    print("in the test1")
@timer
def test2(name,age):
    time.sleep(3)
    print(name,age)

test1()
test2("jelena",12)

執行結果：

C:\Users\jelena.zhao\AppData\Local\Programs\Python\Python36\python3.exe E:/pythonscripts/study/test1/dir01/decorator.py
in the test1
the fun run time is 3.0104000568389893
jelena 12
the fun run time is 3.004999876022339

Process finished with exit code 0