9-2 如何為被裝飾的函式儲存元資料

解決方案:
使用標準庫functools中的裝飾器wraps 裝飾內部包裹函式,可以
制定將原函式的某些屬性，更新到包裹函式的上面
其實也可以通過

wrapper.name = func.name
update_wrapper(wrapper, func, (‘name‘,’doc‘), (‘dict‘,))

f.name 函式的名字
f.doc 函式文件字串
f.module 函式所屬模組名稱
f.dict 函式的屬性字典
f.defaults 預設引數元組
f.closure 函式閉包

from functools import
 
 wraps,update_wrapper
def log(level="low"):
    def deco(func):
        @wraps(func)
        def wrapper(*args,**kwargs):
            ''' I am wrapper function'''
            print "log was in..."
            if level == "low":
                print "detailes was needed"
            return func(*args,**kwargs)
        #wrapper.__name__ = func.__name__
 

        #update_wrapper(wrapper, func, ('__name__','__doc__'), ('__dict__',))
        return wrapper
    return deco

@log()
def myFunc():
    '''I am myFunc...'''
    print "myFunc was called"

print myFunc.__name__
myFunc()