Day12 微信网页登录成功之后，报错IndexError: list index out of range

通过扫描登录网页版微信之后，紧接着就报错了！具体报错信息：

Traceback (most recent call last):
  File "d12_training2.py", line 8, in <module>
    my_friend = bot.friends().search('Somebody')[0]
IndexError: list index out of range

查了报错原因，有一种可能：list本身就是一个空的，没有一个元素，所以当访问到list[0]的时候，就会出现该错误。
尝试：我将

my_friend = bot.friends().search('somebody')[0]
my_friend.send('请给我分享一篇文章')  

改为特定的好友

my_friend = bot.friends().search('三碗饭')[0]
my_friend.send('请给我分享一篇文章')

三碗饭接到要求分享的消息请求，分享后得到下面的信息。

In [1]: Building prefix dict from the default dictionary ...
Dumping model to file cache /var/folders/yp/pwt2r68s0rx8m7th28rq7l140000gp/T/jieba.cache
Loading model cost 1.016 seconds.
Prefix dict has been built succesfully.

Start with d12_training2.py at line 8 and reproduce the post-login friends().search call. Compare the searches for “Somebody”, “somebody”, and “三碗饭”, verifying whether the result is empty before [0] is accessed; done means the cause of the IndexError and the required lesson change are documented.