Python中的闭包与装饰器的用法详解

def w1(func):
   print(‘正在装饰')
    def inner():
        print(‘正在验证权限')
        return inner()

@w1
def f1():
    print('f1')

@w1
@w2
def f1():
        print(‘---f1---')

  def logging(level):
        def wrapper(func):
            def inner_wrapper(*args, **kwargs):
                print "[{level}]: enter function {func}()".format(
                    level=level,
                    func=func.__name__)
                return func(*args, **kwargs)
            return inner_wrapper
        return wrapper
    @logging(level='INFO') def say(something):
        print "say {}!".format(something)
    # 如果没有使用@语法，等同于
    # say = logging(level='INFO')(say)
    @logging(level='DEBUG') def do(something):
        print "do {}...".format(something)
    if __name__ == '__main__':
        say('hello')
        do("my work")

class Test():
    def __call__(self):
        print 'call me!'
t = Test()
t()  # call me

class logging(object):
    def __init__(self, func):
        self.func = func
    def __call__(self, *args, **kwargs):
        print "[DEBUG]: enter function {func}()".format(
            func=self.func.__name__)
        return self.func(*args, **kwargs)
@logging
def say(something):
    print "say {}!".format(something)

class logging(object):
    def __init__(self, level='INFO'):
        self.level = level
    def __call__(self, func): # 接受函数
        def wrapper(*args, **kwargs):
            print "[{level}]: enter function {func}()".format(
                level=self.level,
                func=func.__name__)
            func(*args, **kwargs)
        return wrapper  #返回函数
@logging(level='INFO')
def say(something):
    print "say {}!".format(something)

def getx(self):
    return self._x
def setx(self, value):
    self._x = value
def delx(self):
   del self._x
# create a property
x = property(getx, setx, delx, "I am doc for x property")

@property
def x(self): ...
# 等同于
def x(self): ...
x = property(x)

  def func(functionName):
        def func_in():  	  
        	return functionName()    
        return func_in 
     @func def test():
        return ‘itheima'