问题：如何使用python3制作unicode字符串
我用这个：
u = unicode(text, 'utf-8')
但是Python 3出现了错误（或者…也许我只是忘了包含一些东西）：
NameError: global name 'unicode' is not defined
谢谢。
I used this :
u = unicode(text, 'utf-8')
But getting error with Python 3 (or… maybe I just forgot to include something) :
NameError: global name 'unicode' is not defined
Thank you.
回答 0
在Python3中，文字字符串默认为unicode。
假设这text是一个bytes对象，只需使用text.decode('utf-8')
unicode的Python2等效str于Python3，因此您还可以编写：
str(text, 'utf-8')
若你宁可。
Literal strings are unicode by default in Python3.
Assuming that text is a bytes object, just use text.decode('utf-8')
unicode of Python2 is equivalent to str in Python3, so you can also write:
str(text, 'utf-8')
if you prefer.
回答 1
What’s new in Python 3.0 says:
All text is Unicode; however encoded Unicode is represented as binary
data
If you want to ensure you are outputting utf-8, here’s an example from this page on unicode in 3.0:
b'\x80abc'.decode("utf-8", "strict")
回答 2
作为一种解决方法，我一直在使用：
# Fix Python 2.x.
try:
UNICODE_EXISTS = bool(type(unicode))
except NameError:
unicode = lambda s: str(s)
As a workaround, I’ve been using this:
# Fix Python 2.x.
try:
UNICODE_EXISTS = bool(type(unicode))
except NameError:
unicode = lambda s: str(s)
回答 3
这就是我解决问题的方式，例如将\ uFE0F，\ u000A等字符转换为16字节编码的表情符号。
example = 'raw vegan chocolate cocoa pie w chocolate & vanilla cream\\uD83D\\uDE0D\\uD83D\\uDE0D\\u2764\\uFE0F Present Moment Caf\\u00E8 in St.Augustine\\u2764\\uFE0F\\u2764\\uFE0F '
import codecs
new_str = codecs.unicode_escape_decode(example)[0]
print(new_str)
>>> 'raw vegan chocolate cocoa pie w chocolate & vanilla cream\ud83d\ude0d\ud83d\ude0d❤️ Present Moment Cafè in St.Augustine❤️❤️ '
new_new_str = new_str.encode('utf-16', 'surrogatepass').decode('utf-16')
print(new_new_str)
>>> 'raw vegan chocolate cocoa pie w chocolate & vanilla cream😍😍❤️ Present Moment Cafè in St.Augustine❤️❤️ '
This how I solved my problem to convert chars like \uFE0F, \u000A, etc. And also emojis that encoded with 16 bytes.
example = 'raw vegan chocolate cocoa pie w chocolate & vanilla cream\\uD83D\\uDE0D\\uD83D\\uDE0D\\u2764\\uFE0F Present Moment Caf\\u00E8 in St.Augustine\\u2764\\uFE0F\\u2764\\uFE0F '
import codecs
new_str = codecs.unicode_escape_decode(example)[0]
print(new_str)
>>> 'raw vegan chocolate cocoa pie w chocolate & vanilla cream\ud83d\ude0d\ud83d\ude0d❤️ Present Moment Cafè in St.Augustine❤️❤️ '
new_new_str = new_str.encode('utf-16', 'surrogatepass').decode('utf-16')
print(new_new_str)
>>> 'raw vegan chocolate cocoa pie w chocolate & vanilla cream😍😍❤️ Present Moment Cafè in St.Augustine❤️❤️ '
回答 4
在我使用多年的Python 2程序中，有以下一行：
ocd[i].namn=unicode(a[:b], 'utf-8')
这在Python 3中不起作用。
但是，该程序最终可用于：
ocd[i].namn=a[:b]
我不记得为什么将unicode放在首位，但是我认为这是因为该名称可以包含瑞典字母åäöÅÄÖ。但是，即使它们没有“ unicode”也可以工作。
In a Python 2 program that I used for many years there was this line:
ocd[i].namn=unicode(a[:b], 'utf-8')
This did not work in Python 3.
However, the program turned out to work with:
ocd[i].namn=a[:b]
I don’t remember why I put unicode there in the first place, but I think it was because the name can contains Swedish letters åäöÅÄÖ. But even they work without “unicode”.
回答 5
python 3.x中最简单的方法
text = "hi , I'm text"
text.encode('utf-8')
the easiest way in python 3.x
text = "hi , I'm text"
text.encode('utf-8')
