code: def pay_order_query(self, out_trade_no):
          
  
          package = {
              'partner': self.pay_partner_id,
              'out_trade_no': out_trade_no,
          }
  
          _package = package.items()
          _package.sort()
  
          s = '&'.join(
              [
                  "%s=%s" % (p[0], str(p[1]))
                  for p in (_package + [('key', self.pay_partner_key)])
              ]
          )
          package['sign'] = md5(s).hexdigest().upper()
  
          package = '&'.join(["%s=%s" % (p[0], p[1]) for p in package.items()])
  
          params, sign, _ = self._pay_sign_dict(
              add_noncestr=False, package=package
          )
  
          params['app_signature'] = sign
          params['sign_method'] = 'sha1'
  
          return self.post(
              url="https://api.weixin.qq.com/pay/orderquery", data=params
          )
docs: 查询订单状态
          一般用于无法确定 订单状态时候补偿
  
          :param out_trade_no: 本地订单号
          :return: 订单信息dict