案例：作为班长需要实时转发年级群发布的有关通知、文件到自己班的微信群，这种无脑的重复性工作适用于编写脚本自动帮忙处理。
准备：服务器（可选择阿里云学生服务器）、itchat模块、一颗爱折腾的心
代码：

#coding=utf-8 
import itchat 
from itchat.content import * 

@itchat.msg_register(TEXT, isGroupChat=True) 
def group_text(msg): 
    group = itchat.get_chatrooms(update=True) 
    from_user = '' 
    for g in group: 
        if g['NickName'] == '材硕18级班长支书们':#从群中找到指定的群聊 
            from_group = g['UserName'] 
            for menb in g['MemberList']: 
            #print(menb['NickName']) 
                if menb['NickName'] == "这是发布通知的大佬名字":                       
                    from_user = menb['UserName'] 
                    break 
        if g['NickName'] == '材硕1801':#把消息发到这个群 
            to_group = g['UserName'] 
    if msg['FromUserName'] == from_group: 
        if msg['ActualUserName'] == from_user:
            itchat.send('[大佬有话要说] %s:%s'%(msg['ActualNickName'],msg['Content']),to_group) 

@itchat.msg_register([PICTURE, ATTACHMENT, VIDEO], isGroupChat=True) 
def group_reply_media(msg): 
    group = itchat.get_chatrooms(update=True) 
    from_user = '' 
    for g in group: 
        if g['NickName'] == '材硕18级班长支书们':#从群中找到指定的群聊 
            from_group = g['UserName'] 
            for menb in g['MemberList']: 
            #print(menb['NickName']) 
                if menb['NickName'] == "这是发布通知的大佬名字":                       
                    from_user = menb['UserName'] 
                    break 
        if g['NickName'] == '材硕1801':#把消息发到这个群 
            to_group = g['UserName'] 
    msg['Text'](msg['FileName']) 
    if msg['FromUserName'] == from_group: 
        if msg['ActualUserName'] == from_user:
            msg['Text'](msg['FileName']) 
            itchat.send('@%s@%s'%({'Picture': 'img', 'Video': 'vid'}.get(msg['Type'], 'fil'),msg['FileName']),to_group)

itchat.auto_login(hotReload=False,enableCmdQR=2) 
itchat.run()

上传服务器后通过screen命令进行设置后台运行即可（如下操作）

screen -S cs1  #创建一个screen
python3 cs.py

Ctrl+A+D跳出screen让其后台运行