def greeting_decorator(original_function):
def return_function(*args):
name = 'John'
return f'Hi, I\'m {name}, fullname: {original_function(*args)}'
return return_function
@greeting_decorator
def greeting(name, surname):
return f'{name} {surname}'
print(greeting('John', 'Doe'))
上面,我有一个简单的装饰器功能,可以正常使用。
我想做类似的事情,但是要继承一个类。我该如何继承这样的装饰器函数:
class Guy:
def __init__(self, name):
self.name = 'John'
def greeting_decorator(self, original_function):
def return_function(*args):
return f'Hi, I\'m {self.name}, fullname: {original_function(*args)}'
return return_function
class GuyWithSurname(Guy):
def __init__(self, name, surname):
super().__init__(name)
self.surname = surname
@greeting_decorator # <----- here
def __str__(self):
return f'{self.name} {self.surname}'
JohnDoe = GuyWithSurname('John', 'Doe')
print(JohnDoe)
如果确定父类将始终是Guy
,则可以通过@Guy.greeting_decorator
以下方式简单地进行注释:
class Guy:
def __init__(self, name):
self.name = 'John'
def greeting_decorator(original_function):
def return_function(self, *args):
return f'Hi, I\'m {self.name}, fullname: {original_function(self, *args)}'
return return_function
class GuyWithSurname(Guy):
def __init__(self, name, surname):
super().__init__(name)
self.surname = surname
@Guy.greeting_decorator # <----- here
def __str__(self):
return f'{self.name} {self.surname}'
JohnDoe = GuyWithSurname('John', 'Doe')
这样,当您调用print(JohnDoe)
它时将输出Hi, I'm John, fullname: John Doe
。
请注意,我必须更改greeting_decorator
和return_function
参数才能正确处理self
。
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