最简易的包装：
def myfunc():
pass
def deco(f):
print('before')
f()
print('after')
return f #若python有能力在此返回deco本身 则 deco即可作为装饰！
test.py
class mylocker: def __init__(self): print("mylocker.__init__() called.") @staticmethod def acquire(): print("mylocker.acquire() called.") @staticmethod def unlock(): print(" mylocker.unlock() called.") class lockerex(mylocker): @staticmethod def acquire(): print("lockerex.acquire() called.") @staticmethod def unlock(): print(" lockerex.unlock() called.") def lockhelper(cls): '''cls 必须实现acquire和release静态方法''' def _deco(func): def __deco(*args, **kwargs): print("before %s called." % func.__name__) cls.acquire() try: return func(*args, **kwargs) finally: cls.unlock() return __deco return _deco
test2.py
from test import *
class example: @lockhelper(mylocker) def myfunc(self): print(" myfunc() called.") @lockhelper(mylocker) @lockhelper(lockerex) def myfunc2(self, a, b): print(" myfunc2() called.") return a + b if __name__=="__main__": a = example() # a.myfunc() # print(a.myfunc()) # print(a.myfunc2(1, 2))print(a.myfunc2(3, 4))
result:
before __deco called. mylocker.acquire() called. before myfunc2 called. lockerex.acquire() called. myfunc2() called. lockerex.unlock() called. mylocker.unlock() called. 7
