decorator of log

decorator_1.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import functools

def log(func):
    @functools.wraps(func)
    def wrapper(*args, **kw):
        print 'begin call'
        func(*args, **kw)
        print 'end call'
    return wrapper
      
@log
def now():
    print '2014-10-13'
  
now()

"""

-----------------------------------------------------------------

Result:
    begin call
    2014-10-13
    end call

-----------------------------------------------------------------

"""