python装饰器实例

函数装饰器：

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

# 类型一：装饰器无参数；调用函数无参数
def decorator01(func):
    print "this is calling decorator01!"
    def wrapper():
        func()
    return wrapper

@decorator01
def func01():
    print "this is calling func01!"

# 执行
func01()
print '---------------------'


# 类型二：装饰器无参数；调用函数有参数，参数通用化
def decorator02(func):
    print "this is calling decorator02!"
    def wrapper(*args, **kwargs):
        func(*args, **kwargs)
    return wrapper

@decorator02
def func02(name):
    print "this is calling func02!, name is %s" % (name)

# 执行
func02('wsongl-2')
print '---------------------'


# 类型三：装饰器无参数；调用函数有参数，参数具体化
def decorator03(func):
    print "this is calling decorator03!"
    def wrapper(name):
        func(name)
    return wrapper

@decorator03
def func03(name):
    print "this is calling func03!, name is %s" % (name)

# 执行
func03('wsongl-3')
print '---------------------'


# 类型四：装饰器有参数；调用函数无参数
def decorator04(dec):
    def wrapper(func):
        print 'thi is decorator argms: %s' % (dec)
        def inner():
            func()
        return inner
    return wrapper

@decorator04('log-4')
def func04():
    print "this is calling func04!"

# 执行
func04()
print '---------------------'


# 类型五：装饰器有参数；调用函数有参数，参数通用化，具体参数同上则可
def decorator05(dec):
    def wrapper(func):
        print 'thi is decorator argms: %s' % (dec)
        def inner(*args, **kwargs):
            func(*args, **kwargs)
        return inner
    return wrapper

@decorator05('log-5')
def func05(name):
    print "this is calling func05!, name is %s" % (name)

# 执行
func05('wsongl-5')
print '---------------------'


执行结果如下：
this is calling decorator01!
this is calling func01!
---------------------
this is calling decorator02!
this is calling func02!, name is wsongl-2
---------------------
this is calling decorator03!
this is calling func03!, name is wsongl-3
---------------------
thi is decorator argms: log-4
this is calling func04!
---------------------
thi is decorator argms: log-5
this is calling func05!, name is wsongl-5
---------------------

 

类装饰器：

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

# 装饰类无参数
class Decorator01(object):
    def __init__(self, func):
        self.func = func

    def __call__(self, *args, **kwargs):
        print 'this is calling func __call01__'
        return self.func(*args, **kwargs)

@Decorator01
def wsongl06():
    print 'this is calling wsongl06'

wsongl06()
print '---------------------'


# 装饰类有参数
class Decorator02(object):
    def __init__(self, info='error'):
        self.info = info

    def __call__(self, func):
        def wrapper(*args, **kwargs):
            print 'this is calling func __call02__, info is %s' % ( self.info )
            return func(*args, **kwargs)
        return wrapper

@Decorator02(info='debug')
def wsongl07():
    print 'this is calling wsongl07'

wsongl07()
print '---------------------'


执行结果如下：
this is calling func __call01__
this is calling wsongl06
---------------------
this is calling func __call02__, info is debug
this is calling wsongl07
---------------------