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为啥不能用索引s[0]的方式

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*小小

#1 Created at ... [Delete] [Delete and Lock User]

发现对于空字符串，s[0]的写法会字符越界，为啥呢，其他非空字符串都正常

Kang

#2 Created at ... [Delete] [Delete and Lock User]

在Python中，字符串索引是从0开始的。空字符串没有字符可以索引。

print(len('')) # 0

获取s[0]的写法肯定会字符越界

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