python 编码问题，求助各位大神

Question

想请问下拿到一串unicode编码串，要怎么才能转换中文输出

我发现直接

print u'\u4ed7\u5251\u5929\u6daf'

或者

a = u"\u4ed7\u5251\u5929\u6daf"
print a

是可以输出中文

但是如果把串赋值到变量，用decode，encode转换都不行

a = '\u4ed7\u5251\u5929\u6daf'

不知道怎样print a才能输出中文了？

Answer 1

In Python3, all string types have been changed to unicode. You can use it as follows and the output will be the same

# -*- coding: utf-8 -*-

a = u"\u4ed7\u5251\u5929\u6daf"
print(a, len(a), type(a))

b = "\u4ed7\u5251\u5929\u6daf"
print(b, len(b), type(b))

In Python2.7, adding u means unicode, and not adding it means string, so you directly remove u and get an equivalent string. You can see it by printing the data type and string length respectively

Answer 2

The last sentence
a = 'u4ed7u5251u5929u6daf'
a is actually already a string
So you need to convert a to unicode to print Chinese,
You can use
print a.decode('unicode-escape')
Reference
http://stackoverflow.com/questions/10268518/python-string-to-unicode

Answer 3

The last sentence a = 'u4ed7u5251u5929u6daf' Why should we drop the u before the quotation marks?

Answer 4

The u in front of the Python string indicates that the string should be parsed in unicode encoding.
You use decode, which means you want to convert the string 'u4ed7u5251u5929u6daf' into unicode encoding.