code: def querysets_from_title_prefix(title_prefix=None, model=DEFAULT_MODEL, app=DEFAULT_APP):
      
  
      if title_prefix is None:
          title_prefix = [None]
  
      filter_dicts = []
      model_list = []
      if isinstance(title_prefix, basestring):
          title_prefix = title_prefix.split(',')
      elif not isinstance(title_prefix, dict):
          title_prefix = title_prefix
      if isinstance(title_prefix, (list, tuple)):
          for i, title_prefix in enumerate(title_prefix):
              if isinstance(title_prefix, basestring):
                  if title_prefix.lower().endswith('sales'):
                      title_prefix = title_prefix[:-5].strip('_')
                      title_prefix += [title_prefix]
                      model_list += ['WikiItem']
                  else:
                      model_list += [DEFAULT_MODEL]
              filter_dicts += [{'model__startswith': title_prefix}]
      elif isinstance(title_prefix, dict):
          filter_dicts = [title_prefix]
      elif isinstance(title_prefix, (list, tuple)):
          filter_dicts = util.listify(title_prefix)
      
      model = get_model(model, app)
  
      querysets = []
      for filter_dict, model in zip(filter_dicts, model_list):
          filter_dict = filter_dict or {}
          querysets += [model.objects.filter(**filter_dict)]
docs: Return a list of Querysets from a list of model numbers