Python 如何用修饰的方法派生类？

我有几个类似的python cherrypy应用程序

应用程序_one.py

import cherrypy

class Class(object):

    @cherrypy.tools.jinja(a='a', b='b')
    @cherrypy.expose
    def index(self):
        return {
            'c': 'c'
        }

import cherrypy

class Class(object):

    @cherrypy.tools.jinja(a='a2', b='b2')
    @cherrypy.expose
    def index(self):
        return {
            'c': 'c2'
        } 

import cherrypy

class Class(object):

    @cherrypy.tools.jinja(a='aN', b='bN')
    @cherrypy.expose
    def index(self):
        return {
            'c': 'cN'
        }

import cherrypy

class ParentClass(object):

    _a = None
    _b = None
    _c = None

    @cherrypy.tools.jinja(a=self._a, b=self._b)
    @cherrypy.expose
    def index(self):
        return {
            'c': self._c
        }

import parent

class Class(ParentClass):

    _a = 'a'
    _b = 'b'
    _c = 'c'

应用程序\u two.py

import cherrypy

class Class(object):

    @cherrypy.tools.jinja(a='a', b='b')
    @cherrypy.expose
    def index(self):
        return {
            'c': 'c'
        }

import cherrypy

class Class(object):

    @cherrypy.tools.jinja(a='a2', b='b2')
    @cherrypy.expose
    def index(self):
        return {
            'c': 'c2'
        } 

import cherrypy

class Class(object):

    @cherrypy.tools.jinja(a='aN', b='bN')
    @cherrypy.expose
    def index(self):
        return {
            'c': 'cN'
        }

import cherrypy

class ParentClass(object):

    _a = None
    _b = None
    _c = None

    @cherrypy.tools.jinja(a=self._a, b=self._b)
    @cherrypy.expose
    def index(self):
        return {
            'c': self._c
        }

import parent

class Class(ParentClass):

    _a = 'a'
    _b = 'b'
    _c = 'c'

应用程序\u n.py

import cherrypy

class Class(object):

    @cherrypy.tools.jinja(a='a', b='b')
    @cherrypy.expose
    def index(self):
        return {
            'c': 'c'
        }

import cherrypy

class Class(object):

    @cherrypy.tools.jinja(a='a2', b='b2')
    @cherrypy.expose
    def index(self):
        return {
            'c': 'c2'
        } 

import cherrypy

class Class(object):

    @cherrypy.tools.jinja(a='aN', b='bN')
    @cherrypy.expose
    def index(self):
        return {
            'c': 'cN'
        }

import cherrypy

class ParentClass(object):

    _a = None
    _b = None
    _c = None

    @cherrypy.tools.jinja(a=self._a, b=self._b)
    @cherrypy.expose
    def index(self):
        return {
            'c': self._c
        }

import parent

class Class(ParentClass):

    _a = 'a'
    _b = 'b'
    _c = 'c'

我想创建父类并在所有应用程序中派生它。 像这样的

parent.py

import cherrypy

class Class(object):

    @cherrypy.tools.jinja(a='a', b='b')
    @cherrypy.expose
    def index(self):
        return {
            'c': 'c'
        }

import cherrypy

class Class(object):

    @cherrypy.tools.jinja(a='a2', b='b2')
    @cherrypy.expose
    def index(self):
        return {
            'c': 'c2'
        } 

import cherrypy

class Class(object):

    @cherrypy.tools.jinja(a='aN', b='bN')
    @cherrypy.expose
    def index(self):
        return {
            'c': 'cN'
        }

import cherrypy

class ParentClass(object):

    _a = None
    _b = None
    _c = None

    @cherrypy.tools.jinja(a=self._a, b=self._b)
    @cherrypy.expose
    def index(self):
        return {
            'c': self._c
        }

import parent

class Class(ParentClass):

    _a = 'a'
    _b = 'b'
    _c = 'c'

应用程序_one.py

import cherrypy

class Class(object):

    @cherrypy.tools.jinja(a='a', b='b')
    @cherrypy.expose
    def index(self):
        return {
            'c': 'c'
        }

import cherrypy

class Class(object):

    @cherrypy.tools.jinja(a='a2', b='b2')
    @cherrypy.expose
    def index(self):
        return {
            'c': 'c2'
        } 

import cherrypy

class Class(object):

    @cherrypy.tools.jinja(a='aN', b='bN')
    @cherrypy.expose
    def index(self):
        return {
            'c': 'cN'
        }

import cherrypy

class ParentClass(object):

    _a = None
    _b = None
    _c = None

    @cherrypy.tools.jinja(a=self._a, b=self._b)
    @cherrypy.expose
    def index(self):
        return {
            'c': self._c
        }

import parent

class Class(ParentClass):

    _a = 'a'
    _b = 'b'
    _c = 'c'

应用程序2.py

import parent

class Class(ParentClass):

    _a = 'a2'
    _b = 'b2'
    _c = 'c2'

如何从派生类发送索引方法装饰器的参数

现在我收到错误信息

NameError:未定义名称“self”

定义类时会应用装饰器。定义类时，您没有运行方法，因此未定义

self

。没有可参考的

self

实例

您必须使用元类，在构建子类时添加decorator，或者必须使用类decorator，在定义类后应用正确的decorator

类装饰器可以是：

def add_decorated_index(cls):
    @cherrypy.tools.jinja(a=cls._a, b=cls._b)
    @cherrypy.expose
    def index(self):
        return {
            'c': self._c
        }

    cls.index = index
    return cls

然后将其应用于子类：

import parent

@parent.add_decorated_index
class Class(parent.ParentClass):
    _a = 'a'
    _b = 'b'
    _c = 'c'