列表中的“u"是什么意思? [英] What does 'u' mean in a list?

问题描述

这是我第一次遇到这种情况.刚刚打印了一个列表，每个元素前面似乎都有一个 u，即

[u'hello', u'hi', u'hey']

这是什么意思?为什么列表的每个元素前面都有这个?

因为我不知道这有多常见，如果你想看看我是怎么遇到它的，我很乐意编辑帖子.

解决方案

表示 unicode 字符串.类似于 r'' 用于原始字符串.

<预><代码>>>>类型(u'abc')<输入'unicode'>>>>r'ab\c''ab\\c'

This is the first time I've came across this. Just printed a list and each element seems to have a u in front of it i.e.

[u'hello', u'hi', u'hey']

What does it mean and why would a list have this in front of each element?

As I don't know how common this is, if you'd like to see how I came across it, I'll happily edit the post.

解决方案

it's an indication of unicode string. similar to r'' for raw string.

>>> type(u'abc')
<type 'unicode'>
>>> r'ab\c'
'ab\\c'

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