code: def channel_list(self):
          
  
          if self.current.task_data.get('msg', False):
              if self.current.task_data.get('target_channel_key', False):
                  self.current.output['msgbox'] = {'type': 'info',
                                                   "title": _(u"Successful Operation"),
                                                   "msg": self.current.task_data['msg']}
                  del self.current.task_data['msg']
              else:
                  self.show_warning_messages()
  
          self.current.task_data['new_channel'] = False
          _form = ChannelListForm(title=_(u'Public Channel List'), help_text=CHANNEL_CHOICE_TEXT)
  
          for channel in Channel.objects.filter(typ=15):
              owner_name = channel.owner.username
              _form.ChannelList(choice=False, name=channel.name, owner=owner_name, key=channel.key)
  
          _form.new_channel = fields.Button(_(u"Merge At New Channel"), cmd="create_new_channel")
          _form.existing_channel = fields.Button(_(u"Merge With An Existing Channel"),
                                                 cmd="choose_existing_channel")
          _form.find_chosen_channel = fields.Button(_(u"Split Channel"), cmd="find_chosen_channel")
          self.form_out(_form)
docs: Main screen for channel management.
          Channels listed and operations can be chosen on the screen.
          If there is an error message like non-choice,
          it is shown here.