本文实例讲述了Python实现微信中找回好友、群聊用户撤回的消息功能。分享给大家供大家参考，具体如下：

还在好奇好友撤回了什么消息吗？群里撤回了什么消息？下面的代码实现了：即使群、好友撤回了文本消息、表情、图片等消息，自己也能知道撤回的什么。

#coding=utf-8

import itchat

from itchat.content import TEXT

from itchat.content import *

import sys

import time

import re

import os

msg_information = {}

face_bug=None #针对表情包的内容

@itchat.msg_register([TEXT,PICTURE,FRIENDS,CARD,MAP,SHARING,RECORDING,ATTACHMENT,VIDEO],isFriendChat=True,isGroupChat=True)

def receive_msg(msg):

global face_bug

msg_time_rec = time.strftime("%Y-%m-%d %H:%M:%S", time.localtime()) #接收消息的时间

if 'ActualNickName' in msg:

from_user = msg['ActualUserName'] #群消息的发送者,用户的唯一标识

msg_from = msg['ActualNickName']#发送者群内的昵称

friends = itchat.get_friends(update=True)#获取所有好友

for f in friends:

if from_user == f['UserName']: #如果群消息是好友发的

if f['RemarkName']: # 优先使用好友的备注名称，没有则使用昵称

msg_from = f['RemarkName']

else:

msg_from = f['NickName']

break

groups = itchat.get_chatrooms(update=True)#获取所有的群

for g in groups:

if msg['FromUserName'] == g['UserName']:#根据群消息的FromUserName匹配是哪个群

group_name = g['NickName']

group_menbers = g['MemberCount']

break

group_name = group_name + "(" + str(group_menbers) +")"

else:

if itchat.search_friends(userName=msg['FromUserName'])['RemarkName']:#优先使用备注名称

msg_from = itchat.search_friends(userName=msg['FromUserName'])['RemarkName']

else:

msg_from = itchat.search_friends(userName=msg['FromUserName'])['NickName'] #在好友列表中查询发送信息的好友昵称

group_name = ""

msg_time = msg['CreateTime'] #信息发送的时间

msg_id = msg['MsgId'] #每条信息的id

msg_content = None #储存信息的内容

msg_share_url = None #储存分享的链接，比如分享的文章和音乐

if msg['Type'] == 'Text' or msg['Type'] == 'Friends': #如果发送的消息是文本或者好友推荐

msg_content = msg['Text']

#如果发送的消息是附件、视频、图片、语音

elif msg['Type'] == "Attachment" or msg['Type'] == "Video" \

or msg['Type'] == 'Picture' \

or msg['Type'] == 'Recording':

msg_content = msg['FileName'] #内容就是他们的文件名

msg['Text'](str(msg_content)) #下载文件

elif msg['Type'] == 'Map': #如果消息为分享的位置信息

x, y, location = re.search(

"

if location is None:

msg_content = r"纬度->" + x.__str__() + " 经度->" + y.__str__() #内容为详细的地址

else:

msg_content = r"" + location

elif msg['Type'] == 'Sharing': #如果消息为分享的音乐或者文章，详细的内容为文章的标题或者是分享的名字

msg_content = msg['Text']

msg_share_url = msg['Url'] #记录分享的url

face_bug = msg_content

#将信息存储在字典中，每一个msg_id对应一条信息

time.sleep(2)

msg_information.update(

{

msg_id: {

"msg_from": msg_from,

"msg_time": msg_time,

"msg_time_rec": msg_time_rec,

"msg_type": msg["Type"],

"msg_content": msg_content,

"msg_share_url": msg_share_url,

"group_name":group_name

}

}

)

del_info = []

for k in msg_information:

m_time = msg_information[k]['msg_time'] #取得消息时间

if int(time.time()) - m_time > 130: #如果消息时间是130秒甚至更久之前的，则删除。

del_info.append(k)

if del_info:

for i in del_info:

msg_information.pop(i)

#监听是否有消息撤回

@itchat.msg_register(NOTE,isFriendChat=True,isGroupChat=True,isMpChat=True)

def information(msg):

#如果这里的msg['Content']中包含消息撤回和id，就执行下面的语句

if '撤回了一条消息' in msg['Content']:

old_msg_id = re.search("\(.*?)\", msg['Content']).group(1) #在返回的content查找撤回的消息的id

old_msg = msg_information.get(old_msg_id) #获取到消息原文,类型：字典

print(old_msg)

if len(old_msg_id)<11: #如果发送的是表情包

itchat.send_file(face_bug,toUserName='filehelper')

else: #发送撤回的提示给文件助手

msg_body = old_msg['group_name'] + old_msg['msg_from'] +"\n" + old_msg['msg_time_rec'] \

+ "撤回了:" + "\n" + r"" + old_msg['msg_content']

#如果是分享的文件被撤回了，那么就将分享的url加在msg_body中发送给文件助手

if old_msg['msg_type'] == "Sharing":

msg_body += "\n链接是:" + old_msg.get('msg_share_url')

#print(msg_body)

itchat.send_msg(msg_body, toUserName='filehelper')#将撤回消息发给文件助手

#有文件的话也要将文件发送回去

if old_msg["msg_type"] == "Picture" \

or old_msg["msg_type"] == "Recording" \

or old_msg["msg_type"] == "Video" \

or old_msg["msg_type"] == "Attachment":

file = '@fil@%s' % (old_msg['msg_content'])

itchat.send(msg=file, toUserName='filehelper')

os.remove(old_msg['msg_content'])

msg_information.pop(old_msg_id)# 删除字典旧消息

itchat.auto_login(hotReload=True,enableCmdQR=1)

itchat.run()

希望本文所述对大家Python程序设计有所帮助。