code: def complete_previous(self, count=1, disable_wrap_around=False):
          
          if self.complete_state:
              if self.complete_state.complete_index == 0:
                  index = None
  
                  if disable_wrap_around:
                      return
              elif self.complete_state.complete_index is None:
                  index = len(self.complete_state.current_completions) - 1
              else:
                  index = max(0, self.complete_state.complete_index - count)
  
              self.go_to_completion(index)
docs: Browse to the previous completions.
          (Does nothing if there are no completion.)