代码

import requests
import json
import time
import hmac
import hashlib
import base64
import urllib.parse

def get_url(access_token, secret):
    t,s = get_sign(secret)
    webhook_url = f'https://oapi.dingtalk.com/robot/send?access_token={access_token}&timestamp={t}&sign={s}'
    return webhook_url

def get_sign(secret):
    timestamp = str(round(time.time() * 1000))
    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))
    return timestamp,sign

def send_text_message(content):
    headers = {'Content-Type': 'application/json;charset=utf-8'}
    data = {
        "msgtype": "text",
        "text": {
            "content": content
        }
    }
    webhook_url = get_url(ACCESS_TOKEN, SECRET)
    response = requests.post(webhook_url, headers=headers, data=json.dumps(data))
    result = json.loads(response.text)
    if result['errcode'] == 0:
        print('消息发送成功')
    else:
        print('消息发送失败：', result['errmsg'])

if __name__ == '__main__':
    content = 'lol'
    send_text_message(content)

注意：这只是个单向推送的机器人，只能用来向群里推送（定时）消息，不能回复。

参考文档

• 自定义机器人安全设置