商户付款到指定微信用户接口调用python实现

文档地址：https://pay.weixin.qq.com/wiki/doc/api/tools/mch_pay.php?chapter=14_2

代码实现：

class WxHandle(object):
    def __init__(self, url, base_param, key, cert_path):
        """
        :param url: 请求api
        :param base_param: 基本参数 examle   {'appid':'wxd930ea5d5a258f4f','mch_id': '10000100','device_info': '1000','body': 'test'}
        :param key: 商户平台设置的密钥key
        :param cert_path: 证书路径配置 字典形式
        """
        self.key = key
        self.url = url
        self.base_param = base_param
        self.cert_path = cert_path

    def get_sign(self, param):
        assert isinstance(param, dict), "param must be dict instance"
        keys = sorted(param)
        stringA = ''
        for index, key in enumerate(keys):
            if not param[key]:
                continue
            if index == len(keys)-1:
                stringA += key + '=' + str(param[key])
            else:
                stringA += key + '=' + str(param[key]) + "&"

        stringSignTemp = stringA + '&key=' + self.key
        md = hashlib.md5()
        md.update(stringSignTemp.encode('utf-8'))
        sign = md.hexdigest().upper()
        return sign

    def generate_random(self):
        return str(uuid.uuid4()).replace('-', '')

    def dict_to_xml(self, dict_data):
        data = xmltodict.unparse(dict(xml=dict_data))
        return data

    def parse_xml(self, xml_data):
        return dict(xmltodict.parse(xml_data).get('xml'))

    def get_res_param(self, param):
        param['nonce_str'] = self.generate_random()
        param['sign'] = self.get_sign(param)
        self.dict_to_xml(param)
        return self.dict_to_xml(param)

    def request(self):
        param = self.get_res_param(self.base_param)
        headers = {'Content-Type': 'application/xml'}
        try:
            res = requests.post(self.url, data=param, headers=headers,
                                cert=(self.cert_path.get('CERT_PATH'), self.cert_path.get('CERT_KEY_PATH')), verify=True)
        except Exception as e:
            print(e)  # 处理异常
            res = None
        return res


if __name__ == '__main__':
    url = 'https://api.mch.weixin.qq.com/mmpaymkttransfers/promotion/transfers'
    key = "192006250b4c09247ec02edce69f6a2d"
    cert_path = {"CERT_PATH": "apiclient_cert.pem", "CERT_KEY_PATH": "apiclient_key.pem"}
    base_param = {
        'appid':'wxd930ea5d5a258f4f',
        'mch_id': '10000100',
        'device_info': '1000',
        'body': 'test'
    }

    handle = WxHandle(url, base_param, key, cert_path)
    resp = handle.request()
    data = handle.parse_xml(resp.text)
    print(data)

使用场景：第三方平台的用户提现