Python-сообщество

class ApplicationInstance(Component, ComponentManager):
    implements(ITemplateLoader, ITranslationProvider)

    def __init__(self):
        super(ApplicationInstance, self).__init__()
        self.config = self.load_config()
        self.load_components()
        ...
    def load_config(self):
        return config_factory()

class Option(object):
    '''Config option
    '''
    
    converter = lambda x:x
    
    def __init__(self, section, name, default=None, doc=''):
        self._section = section
        self._name = name
        self._default = default
        self.__doc__ = doc

    def __get__(self, instance, owner):
        try:
            return self.converter(instance.compmgr.config[self._section][self._name])
        except AttributeError:
            return self._default

    def __set__(self, instance, value):
        raise AttributeError, 'can\'t set attribute'
        
    def __repr__(self):
        return '<%s [%s] "%s">' % (self.__class__.__name__, self._section, self._name)

class IntOption(Option):
    """Descriptor for integer configuration options."""
    converter = int


class SomeUsefulComponent(Component):
    name = Option('main', 'name', doc='Name of component')
    max_size = IntOption('main', 'max_buffer_size', 1024, 'Max size of buffer.')

   def do_something(self):
       print self.name

 from Flask import current_app
current_app.config