python报错 ValueError: dictionary update sequence element #0 has length 1； 2 is require

原文链接地址：
https://blog.youkuaiyun.com/weixin_40894428/article/details/80683137
字符串转字典要用eval（），这个方法很多书上都没有介绍，
有关eval（）的用法，传送门：
http://www.runoob.com/python/python-func-eval.html

另外我的是比较基础的：

>>> ss = ['a','bc','def']
>>> dict(ss)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: dictionary update sequence element #0 has length 1; 2 is required
>>> eval(ss)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: eval() arg 1 must be a string, bytes or code object
>>>
>>> ss = ['aa','bc','def']
>>> dict(ss)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: dictionary update sequence element #2 has length 3; 2 is required
>>> ss = ['a','bc','de']
>>> dict(ss)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: dictionary update sequence element #0 has length 1; 2 is required
>>> ss = ['aa','bc','de']#改为2个字符就好啦！
>>> dict(ss)
{'a': 'a', 'b': 'c', 'd': 'e'}
>>> ss = ['awed','webc','wede']
>>> dict(ss)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: dictionary update sequence element #0 has length 4; 2 is required
>>>

这个仅仅是因为，需要转换的字符串不是2位!