paySig = to_hex(hmac_sha256(appKey,method + '&' + signData))

  import hmac
  import hashlib
  import urllib.parse

  # sign_data 支付原串 注意这里sign_data需要和前端请求参数保持一致，原格式传递（包括空格和回车），建议后台下发，
  # appKey
  # method
  def gen_pay_sig(sign_data, appkey, method):
      need_encode_body = method + '&' + sign_data
      print(need_encode_body)
      return hmac.new(key=appkey.encode('utf-8'), msg=need_encode_body.encode('utf-8'),
              digestmod=hashlib.sha256).hexdigest()

pay_event_sig = to_hex(hmac_sha256(app_key, event + '&' + payload))


#!/usr/bin/python
# -*- coding: utf-8 -*-
""" PayEventSig签名算法计算示例 """
 
import hmac
import hashlib
 
 
def calc_pay_event_sig(event, payload, app_key):
    """ pay_event_sig签名算法
      Args:
          event       - 事件类型 创建订单传入event
          payload     - 事件对应包体，通知消息中的payload 例如{"OpenId":"to_user_openid","OutTradeNo":"xxxxxxx","WeChatPayInfo":{"MchOrderNo":"xxxxxxx","TransactionId":"xxxxxxx"},"Env":0,"CoinInfo":{"ZoneId":"1","TotalPrice":100,"BuyQuantity":1,"OrigPrice":100}}
          app_key      - superapp配置的虚拟支付秘钥
      Returns:
          支付请求签名pay_event_sig
    """
    need_sign_msg = event + '&' + payload
    pay_sig = hmac.new(key=appkey.encode('utf-8'), msg=need_sign_msg.encode('utf-8'),
                       digestmod=hashlib.sha256).hexdigest()
    return pay_sig