import functools

def log(func):

def wrapper():

print('begin call')

func()

print('end call')

return wrapper

def log(text):

if isinstance(text, str):

def decorator(func):

@functools.wraps(func)

def wrapper(*args, **kw):

print('begin call %s %s' %(text, func.__name__))

func(*args, **kw)

print('end call %s %s' % (text, func.__name__))

return wrapper

return decorator

else:

@functools.wraps(text)

def wrapper(*args, **kw):

print('begin call %s' % text.__name__)

text(*args, **kw)

print('end call %s' % text.__name__)

return wrapper

@log('let`s go')

def gogogogogo():

print('2017-02-13')

@log

def now():

print('2017-2-14')

now()

gogogogogo()