code: def p_static_scalar_unary_op(p):
      '''static_scalar : PLUS static_scalar
                       | MINUS static_scalar'''
      p[0] = ast.UnaryOp(p[1], p[2], lineno=p.lineno(1)f p_static_scalar_unary_op(p):
      '''static_scalar : PLUS static_scalar
                       | MINUS static_scalar'''
      p[0] = ast.UnaryOp(p[1], p[2], lineno=p.lineno(1))
docs: static_scalar : PLUS static_scalar
                       | MINUS static_scalar