准备工作：

到企业微信官网，注册一个企业；登录企业微信后台，创建一个“自建”应用， 获取企业ID、agentid、secret这3个必要的参数；在企业微信的通讯录中，创建多个测试账号；在手机端安装“企业微信”APP，使用测试账号登录到企业微信，准备接收消息。

程序代码：

企业微信提供API开发接口，通过HTTPS的GET、POST方法与企业微信后台进行交互，完成获取令牌、发送数据、获取数据的操作。

Python代码主要使用requests库，将企业微信API进行简单封装，模拟https的GET、POST操作，向指定的用户发送企业微信消息。

#!/usr/bin/env python
# -*- coding: utf-8 -*-
 
import time
import requests
import json
 
 
class WeChat:
    def __init__(self):
        self.CORPID = 'ww2e1234567895498f5498f'  #企业ID，在管理后台获取
        self.CORPSECRET = 'xy11234567898hk_ecJ123456789DhKy4_1y12345OI'#自建应用的Secret，每个自建应用里都有单独的secret
        self.AGENTID = '1000002'  #应用ID，在后台应用中获取
        self.TOUSER = "maomao|dingding"  # 接收者用户名,多个用户用|分割
 
    def _get_access_token(self):
        url = 'https://qyapi.weixin.qq.com/cgi-bin/gettoken'
        values = {'corpid': self.CORPID,
                  'corpsecret': self.CORPSECRET,
                  }
        req = requests.post(url, params=values)
        data = json.loads(req.text)
        return data["access_token"]
 
    def get_access_token(self):
        try:
            with open('./tmp/access_token.conf', 'r') as f:
                t, access_token = f.read().split()
        except:
            with open('./tmp/access_token.conf', 'w') as f:
                access_token = self._get_access_token()
                cur_time = time.time()
                f.write('\t'.join([str(cur_time), access_token]))
                return access_token
        else:
            cur_time = time.time()
            if 0 < cur_time - float(t) < 7260:
                return access_token
            else:
                with open('./tmp/access_token.conf', 'w') as f:
                    access_token = self._get_access_token()
                    f.write('\t'.join([str(cur_time), access_token]))
                    return access_token
 
    def send_data(self, message):
        send_url = 'https://qyapi.weixin.qq.com/cgi-bin/message/send?access_token=' + self.get_access_token()
        send_values = {
            "touser": self.TOUSER,
            "msgtype": "text",
            "agentid": self.AGENTID,
            "text": {
                "content": message
                },
            "safe": "0"
            }
        send_msges=(bytes(json.dumps(send_values), 'utf-8'))
        respone = requests.post(send_url, send_msges)
        respone = respone.json()   #当返回的数据是json串的时候直接用.json即可将respone转换成字典
        return respone["errmsg"]
 
 
if __name__ == '__main__':
    wx = WeChat()
    wx.send_data("这是程序发送的第1条消息！\n Python程序调用企业微信API,从自建应用“告警测试应用”发送给管理员的消息！")
    wx.send_data("这是程序发送的第2条消息！")

https://blog.csdn.net/CSDN_duomaomao/article/details/90193422

#!/usr/bin/python
# -*- coding: utf-8 -*-

import time
import requests
import json,os


class WeChat_SMS:
    def __init__(self):
        self.CORPID = 'XXXX'#企业ID， 登陆企业微信，在我的企业-->企业信息里查看
        self.CORPSECRET = 'XXXXX'#自建应用，每个自建应用里都有单独的secret
        self.AGENTID = 'XXXX' #应用代码
        self.TOUSER = "XXX"# 接收者用户名,@all 全体成员
        self.TOPARY = "2"    #部门ID


    def _get_access_token(self):
        url = 'https://qyapi.weixin.qq.com/cgi-bin/gettoken'
        values = {'corpid': self.CORPID,'corpsecret': self.CORPSECRET,}
        req = requests.post(url, params=values)
        data = json.loads(req.text)
        #print (data)
        return data["access_token"]

    def get_access_token(self):
        try:
            with open('access_token.conf', 'r') as f:
                t, access_token = f.read().split()
        except:
            with open('access_token.conf', 'w') as f:
                access_token = self._get_access_token()
                cur_time = time.time()
                f.write('\t'.join([str(cur_time), access_token]))
                return access_token
        else:
            cur_time = time.time()
            if 0 < cur_time - float(t) < 7200:#token的有效时间7200s
                return access_token
            else:
                with open('access_token.conf', 'w') as f:
                    access_token = self._get_access_token()
                    f.write('\t'.join([str(cur_time), access_token]))
                    return access_token

    def send_data(self, msg):
        send_url = 'https://qyapi.weixin.qq.com/cgi-bin/message/send?access_token=' + self.get_access_token()
        send_values = {
            "touser": self.TOUSER,
            #"toparty": self.TOPARY, 	#设置给部门发送
            "msgtype": "text",
            "agentid": self.AGENTID,
            "text": {
            "content": msg
            },
            "safe": "0"
        }
        send_msges=(bytes(json.dumps(send_values), 'utf-8'))
        respone = requests.post(send_url, send_msges)
        respone = respone.json()#当返回的数据是json串的时候直接用.json即可将respone转换成字典
        #print (respone["errmsg"])
        return respone["errmsg"]


if __name__ == '__main__':
    wx = WeChat_SMS()
    wx.send_data(msg="服务崩了，你还在这里吟诗作对？")
    #以下是添加对日志的监控
    # srcfile = u"G:/123.txt"
    # file = open(srcfile)
    # file.seek(0, os.SEEK_END)
    # while 1:
    #     where = file.tell()
    #     line = file.readline()
    #     if not line:
    #         time.sleep(1)
    #         file.seek(where)
    #     else:
    #         print(line)
    #         wx.send_data(msg=line)

https://blog.csdn.net/liyyzz33/article/details/86080936