Python3使用钉钉机器人推送消息（签名方式）

 import time
 import hmac
 import hashlib
 import base64
 import urllib
 import json
 import requests
 import logging

 try:
     JSONDecodeError = json.decoder.JSONDecodeError
 except AttributeError:
     JSONDecodeError = ValueError

 def is_not_null_and_blank_str(content):
     if content and content.strip():
         return True
     else:
         return False

 class DingtalkRobot(object):
     def __init__(self, webhook, sign=None):
         super(DingtalkRobot, self).__init__()
         self.webhook = webhook
         self.sign = sign
         self.headers = {'Content-Type': 'application/json; charset=utf-8'}
         self.times = 0
         self.start_time = time.time()

     # 加密签名
     def __spliceUrl(self):
         timestamp = int(round(time.time() * 1000))
         secret = self.sign
         secret_enc = secret.encode('utf-8')
         string_to_sign = '{}\n{}'.format(timestamp, secret)
         string_to_sign_enc = string_to_sign.encode('utf-8')
         hmac_code = hmac.new(secret_enc, string_to_sign_enc, digestmod=hashlib.sha256).digest()
         sign = urllib.parse.quote_plus(base64.b64encode(hmac_code))
         url = f"{self.webhook}&timestamp={timestamp}&sign={sign}"
         return url

     def send_text(self, msg, is_at_all=False, at_mobiles=[]):
         data = {"msgtype": "text", "at": {}}
         if is_not_null_and_blank_str(msg):
             data["text"] = {"content": msg}
         else:
             logging.error("text类型，消息内容不能为空！")
             raise ValueError("text类型，消息内容不能为空！")

         if is_at_all:
             data["at"]["isAtAll"] = is_at_all

         if at_mobiles:
             at_mobiles = list(map(str, at_mobiles))
             data["at"]["atMobiles"] = at_mobiles

         logging.debug('text类型：%s' % data)
         return self.__post(data)

     def __post(self, data):
         """
         发送消息（内容UTF-8编码）
         :param data: 消息数据（字典）
         :return: 返回发送结果
         """
         self.times += 1
         if self.times > 20:
             if time.time() - self.start_time < 60:
                 logging.debug('钉钉官方限制每个机器人每分钟最多发送20条，当前消息发送频率已达到限制条件，休眠一分钟')
                 time.sleep(60)
             self.start_time = time.time()

         post_data = json.dumps(data)
         try:
             response = requests.post(self.__spliceUrl(), headers=self.headers, data=post_data)
         except requests.exceptions.HTTPError as exc:
             logging.error("消息发送失败， HTTP error: %d, reason: %s" % (exc.response.status_code, exc.response.reason))
             raise
         except requests.exceptions.ConnectionError:
             logging.error("消息发送失败，HTTP connection error!")
             raise
         except requests.exceptions.Timeout:
             logging.error("消息发送失败，Timeout error!")
             raise
         except requests.exceptions.RequestException:
             logging.error("消息发送失败, Request Exception!")
             raise
         else:
             try:
                 result = response.json()
             except JSONDecodeError:
                 logging.error("服务器响应异常，状态码：%s，响应内容：%s" % (response.status_code, response.text))
                 return {'errcode': 500, 'errmsg': '服务器响应异常'}
             else:
                 logging.debug('发送结果：%s' % result)
                 if result['errcode']:
                     error_data = {"msgtype": "text", "text": {"content": "钉钉机器人消息发送失败，原因：%s" % result['errmsg']},
                                   "at": {"isAtAll": True}}
                     logging.error("消息发送失败，自动通知：%s" % error_data)
                     requests.post(self.webhook, headers=self.headers, data=json.dumps(error_data))
                 return result

 if __name__ == '__main__':
     URL = "你的钉钉机器人地址"
     SIGN = "签名"
     ding = DingtalkRobot(URL, SIGN)
     print(ding.send_text("Hello World"))

做通知实例，如图：