itchat包中的__init__.py是该库的入口；在该文件中的源码如下：
# -*- coding: utf-8 -*-
from . import content
from .core import Core
from .config import VERSION
from .log import set_logging
__version__ = VERSION
# 实例列表，添加处理微信的实例对象
instanceList = []
def new_instance():
"""
用于创建一个新的`Core`的实例化对象，并且返回,
newInstance = Core()是最终封装的实例化对象，封装了Storage，requests，等属性
"""
newInstance = Core()
instanceList.append(newInstance)
return newInstance
# 封装`Core`的实例化对象在`originInstance`
# `originInstance` = `newInstance` = `Core()`
originInstance = new_instance()
# I really want to use sys.modules[__name__] = originInstance
# but it makes auto-fill a real mess, so forgive me for my following **
# actually it toke me less than 30 seconds, god bless Uganda
# components.login
# 在components.login中实现重构
login = originInstance.login
get_QRuuid = originInstance.get_QRuuid
get_QR = originInstance.get_QR
check_login = originInstance.check_login
web_init = originInstance.web_init
show_mobile_login = originInstance.show_mobile_login
start_receiving = originInstance.start_receiving
get_msg = originInstance.get_msg
logout = originInstance.logout
# components.contact
# 在components.contact中实现重构
update_chatroom = originInstance.update_chatroom
update_friend = originInstance.update_friend
get_contact = originInstance.get_contact
get_friends = originInstance.get_friends
get_chatrooms = originInstance.get_chatrooms
get_mps = originInstance.get_mps
set_alias = originInstance.set_alias
set_pinned = originInstance.set_pinned
add_friend = originInstance.add_friend
get_head_img = originInstance.get_head_img
create_chatroom = originInstance.create_chatroom
set_chatroom_name = originInstance.set_chatroom_name
delete_member_from_chatroom = originInstance.delete_member_from_chatroom
add_member_into_chatroom = originInstance.add_member_into_chatroom
# components.messages
# 在components.login中实现重构
send_raw_msg = originInstance.send_raw_msg
send_msg = originInstance.send_msg
upload_file = originInstance.upload_file
send_file = originInstance.send_file
send_image = originInstance.send_image
send_video = originInstance.send_video
send = originInstance.send
revoke = originInstance.revoke
# components.hotreload
# 在components.hotreload中实现重构
dump_login_status = originInstance.dump_login_status
load_login_status = originInstance.load_login_status
# components.register
# 在components.register中实现重构
auto_login = originInstance.auto_login
configured_reply = originInstance.configured_reply
msg_register = originInstance.msg_register
run = originInstance.run
# other functions
search_friends = originInstance.search_friends
search_chatrooms = originInstance.search_chatrooms
search_mps = originInstance.search_mps
set_logging = set_logging