Python - 装饰器

import time
import functools

def exec_time(func):
def wrapper(*args, **kw):
print(time.strftime('%Y-%m-%d %H:%M:%S',time.localtime(time.time())))
return func(*args, **kw)
return wrapper

@exec_time
def testfunc():
print("test function...")

testfunc()
print(testfunc.__name__)

print("=====================")

def exec_time(text):
def deractor(func):
@functools.wraps(func)
def wrapper(*args, **kw):
print(time.strftime(text, time.localtime(time.time())))
return func(*args, **kw)
return wrapper
return deractor

@exec_time('%Y-%m-%d')
def testfunc():
print("test function...")

testfunc()
print(testfunc.__name__)

print("=====================")

def exec_time(text):
def deractor(func):
@functools.wraps(func)
def wrapper(*args, **kw):
print("begin time:", time.strftime(text, time.localtime(time.time())))
t = func(*args, **kw)
print("end time:", time.strftime(text, time.localtime(time.time())))
return t;
return wrapper
return deractor

@exec_time('%Y-%m-%d %H:%M:%S')
def testfunc():
print("test function...")

testfunc()
print(testfunc.__name__)

2017-12-03 20:50:00
test function...
wrapper
=====================
2017-12-03
test function...
testfunc
=====================
begin time: 2017-12-03 20:50:00
test function...
end time: 2017-12-03 20:50:00
testfunc