old_contents: from system.translations import Translations
  
  __author__ = 'Sean'
  
  _ = Translations().get()
  
  
  class Channel(object):
  
      name = ""
      users = None
  
      def __init__(self, name, protocol=None):
          self.name = name
          self.protocol = protocol
          self.users = set()
  
      def respond(self, message):
          raise NotImplementedError(_("This method must be overridden"))
  
      def add_user(self, user):
          self.users.add(user)
  
      def remove_user(self, user):
          try:
              self.users.remove(user)
          except KeyError:
              self.protocol.log.debug(
                  "Tried to remove non-existent user \"%s\" from channel \"%s\""
                  % (user, self)
              )
  
new_contents: from system.translations import Translations
  
  __author__ = 'Sean'
  
  _ = Translations().get()
  
  
  class Channel(object):
      """
      A channel - Represents a channel on a protocol. Subclass this!
  
      @ivar name The name of the channel
      @ivar users A set containing all the User objects in the channel
      """
  
      def __init__(self, name, protocol=None):
          """
          Initialise the channel. Remember to call super in subclasses!
  
          :arg name: The name of the channel
          :type name: str
  
          :arg protocol: The protocol object this channel belongs to
          :type protocol: Protocol
          """
  
          self.name = name  # This is essential!
          self.protocol = protocol  # May be None for one-off or fake channels
          self.users = set()  # This is also essential!
  
      def respond(self, message):
          raise NotImplementedError(_("This method must be overridden"))
  
      def add_user(self, user):
          self.users.add(user)
  
      def remove_user(self, user):
          try:
              self.users.remove(user)
          except KeyError:
              self.protocol.log.debug(
                  "Tried to remove non-existent user \"%s\" from channel \"%s\""
                  % (user, self)
              )
  
subject: Remove unneeded properties in base Channel class