# 一、用函数修饰函数
#!/usr/bin/python3
def decorate_func(func):
def call(*args, **kwargs):
print('you have called %s()' % (func.__name__))
func(*args, **kwargs)
return call
@decorate_func
def func(name):
print('I am not a party member.my name is %s.' % (name))
func(name='Tom')
# 二、用函数修饰类
#!/usr/bin/python3
def decorate_class(aClass):
def call(*args, **kwargs):
print('you have create a %s class, its name is %s.' % (aClass.__name__, args[0]))
return aClass(*args, **kwargs)
return call
@decorate_class
class People():
def __init__(self, name):
self.name = name
def print(self):
print('My name is %s.' % (self.name))
a = People('Tom')
b = People('Jerry')
# 三、用函数修饰类方法
#!/usr/bin/python3
def decorate_method(func):
def call(*args, **kwargs):
print('you have called %s().' % (func.__name__))
func(*args, **kwargs)
return call
class aClass():
def __init__(self, name):
self.name = name
@decorate_method
def print(self):
print('My name is %s.' % (self.name))
a = aClass('Jerry')
a.print()
# 四、用类修饰函数
#!/usr/bin/python3
class decorate_func():
def __init__(self, func):
self.func = func
def __call__(self, *args, **kwargs):
print('youhave called %s().' % (self.func.__name__))
self.func(*args, **kwargs)
@decorate_func
def func(name):
print('My name is %s.' % (name))
func('Bob')
# 五、用类修饰类
#!/usr/bin/python3
class decorate_class():
def __init__(self, aClass):
self.aClass = aClass
def __call__(self, *args, **kwargs):
print('You have created a %s class.' % (self.aClass.__name__))
return self.aClass(*args, **kwargs)
@decorate_class
class People():
def __init__(self, name):
self.name = name
def print(self):
print('My name is %s .' % (self.name))
a = People('Tom')
# 六、匿名函数作为函数修饰器
#~/usr/bin/python3
def attrsetter(attr, value):
""" Return a function that sets ``attr`` on its argument and returns it. """
return lambda method: setattr(method, attr, value) or method
def depends(*args):
if args and callable(args[0]):
args = args[0]
elif any('id' in arg.split('.') for arg in args):
raise NotImplementedError("Compute method cannot depend on field 'id'.")
return attrsetter('_depends', args)
class People():
def __init__(self, name):
self.name = name
# 这里用的是函数修饰器，但不是depends函数，而是depends函数执行完之后返回的匿名函数作为函数装饰器
@depends('test')
def print(self):
print('My name is %s .' % (self.name, ))
a = People('Tom')
a.print()
print(a.print.__dict__)
