python 列表中的“u”是什么意思？
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What does 'u' mean in a list?
提问by Federer
This is the first time I've came across this. Just printed a list and each element seems to have a uin front of it i.e.
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u前面似乎都有一个，即
[u'hello', u'hi', u'hey']
What does it mean and why would a list have this in front of each element?
这是什么意思，为什么列表在每个元素前面都有这个？
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.
由于我不知道这有多常见，如果你想看看我是如何遇到它的，我很乐意编辑这篇文章。
回答by SilentGhost
it's an indication of unicode string. similar to r''for raw string.
它是 unicode 字符串的指示。类似于r''原始字符串。
>>> type(u'abc')
<type 'unicode'>
>>> r'ab\c'
'ab\c'
回答by Rasmus Kaj
The ujust means that the following string is a unicode string (as opposed to a plain ascii string). It has nothing to do with the list that happens to contain the (unicode) strings.
的u只是意味着下面的字符串是Unicode字符串（相对于纯ASCII字符串）。它与恰好包含（unicode）字符串的列表无关。
回答by toasteroven
I believe the u' prefix creates a unicode string instead of regular ascii
我相信 u' 前缀会创建一个 unicode 字符串而不是常规的 ascii
