http://blog.csdn.net/mdpsdhr/article/details/61195817

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

@itchat.msg_register([PICTURE,TEXT])
def simple_reply(msg):
    if msg[‘Type‘] == TEXT:
        ReplyContent = ‘I received message: ‘+msg[‘Content‘]
    if msg[‘Type‘] == PICTURE:
        ReplyContent = ‘I received picture: ‘+msg[‘FileName‘]
    itchat.send_msg(‘nice to meet you‘,msg[‘FromUserName‘])
itchat.auto_login()
itchat.run()

• 这里注册了两个消息类型，文本和图片(表情),当微信接收到这两个消息时就会进入注册的函数simple_reply,msg是一个字典类型里面包含了消息数据包，有发送者、接收者、消息类型、消息内容等超多的信息
• itchat要注册消息类型，比如注册了TEXT(itchat.content.text)，就会接收文本消息，其他消息不会触发函数。消息类型见库中的content.py文件
• 消息类型判断，msg[‘Type’]
• 消息发起者,msg[‘FromUserName’]
• 消息接收者,msg[‘ToUserName’]
• 文本消息,msg[‘Content’]
• 文件名字,msg[‘FileName’],注：如果是自带的表情就会显示表情
• 发送文件时，文件名字应该是unicode编码(这是python内部默认的编码风格) 
• 如果想要指定向某人发送信息，
• 则

  itchat.send_msg(‘nice to meet you‘,msg[‘FromUserName‘])里面的

  msg[‘FromUserName‘]替换成要发送到人的UserName

• #coding=utf-8
  import itchat
  from itchat.content import *
  
  # @itchat.msg_register([PICTURE,TEXT])
  # def simple_reply(msg):
  #     if msg[‘Type‘] == TEXT:
  #         ReplyContent = ‘I received message: ‘+msg[‘Content‘]
  #     if msg[‘Type‘] == PICTURE:
  #         ReplyContent = ‘I received picture: ‘+msg[‘FileName‘]
  #     itchat.send_msg(‘nice to meet you‘,msg[‘FromUserName‘])
  itchat.auto_login(hotReload=True)
  #itchat.run()
  friends_info = itchat.get_friends(update=True)
  for i in friends_info:
      print(i)  #打印每个好友的信息
  itchat.send_msg(‘nice to meet you‘,‘******‘)

  上面的程序可打印出每个好友的信息