python中的Unicode-Ascii混合字符串

Question

I have a string that is stored in DB as:

FB (\u30a8\u30a2\u30eb\u30fc)

when I load this row from python code, I am unable to format it correctly.

# x = load that string
print x # returns u'FB (\\u30a8\\u30a2\\u30eb\\u30fc)'

Notice two "\\" This messes up the unicode chars on frontend Instead of showing the foreign chars, html shows it as \エ\ア\ル\ー

However, if I load append some characters to convert it into a json format and load the json, I get the expected result.

s = '{"a": "%s"}'%x
json.loads(s)['a']
#prints u'FB (\u30a8\u30a2\u30eb\u30fc)'

Notice the difference between this result (which shows up correctly on frontend) and directly printing x (which has extra ). So though this hacky solution works, I want a cleaner solution. I played around a lot with x.encode('utf-8') etc, but none has worked yet.

Thank you!

Answer 1

Since you already have a Unicode string, encode it back to ASCII and decode it with the unicode_escape codec:

>>> s = u'FB (\\u30a8\\u30a2\\u30eb\\u30fc)'
>>> s
u'FB (\\u30a8\\u30a2\\u30eb\\u30fc)'
>>> print s
FB (\u30a8\u30a2\u30eb\u30fc)
>>> s.encode('ascii').decode('unicode_escape')
u'FB (\u30a8\u30a2\u30eb\u30fc)'
>>> print s.encode('ascii').decode('unicode_escape')
FB (エアルー)

Answer 2

raw_string = '\u30a8\u30a2\u30eb\u30fc'
string = ''.join([unichr(int(r, 16)) for r in raw_string.split('\\u') if r])
print(string)

A way to solve this, expecting a better answer.