code: def get_template_context_processors(exclude=(), append=(),
                          current={'processors': TEMPLATE_CONTEXT_PROCESSORS}):
      
  
      current['processors'] = tuple(
          [p for p in current['processors'] if p not in exclude]
      ) + tuple(append)
  
      return current['processors']
docs: Returns TEMPLATE_CONTEXT_PROCESSORS without the processors listed in
      exclude and with the processors listed in append.
  
      The use of a mutable dict is intentional, in order to preserve the state of
      the TEMPLATE_CONTEXT_PROCESSORS tuple across multiple settings files.