parameters: (self, new_next)
docstring: replace the existing value of the self.next attribute with
              new_next parameter
docstring_summary: replace the existing value of the self.next attribute with
              new_next parameter
docstring_tokens: replace the existing value of the self . next attribute with new_next parameter
function: def set_next(self, new_next):
          """ replace the existing value of the self.next attribute with
              new_next parameter
          """
          self.next = new_next
function_tokens: def set_next ( self , new_next ) : self . next = new_next