code: def p_lconcatlist(self, p):
          'lconcatlist : lconcatlist COMMA lconcat_one'
          p[0] = p[1] + (p[3],)
          p.set_lineno(0, p.lineno(1)f p_lconcatlist(self, p):
          'lconcatlist : lconcatlist COMMA lconcat_one'
          p[0] = p[1] + (p[3],)
          p.set_lineno(0, p.lineno(1))
docs: lconcatlist : lconcatlist COMMA lconcat_one