使用 Unicode 的 Python 和正则表达式

我需要从字符串‘’中删除一些 Unicode 符号

我知道它们肯定存在，我试过了:

re.sub('([\u064B-\u0652\u06D4\u0670\u0674\u06D5-\u06ED]+)', '', 'بِسْمِ اللَّهِ الرَّحْمَٰنِ الرَّحِيمِ')

但是它不起作用，字符串保持不变，我做错了什么？

102481 次浏览
小开
最佳答案

Are you using python 2.x or 3.0?

If you're using 2.x, try making the regex string a unicode-escape string, with 'u'. Since it's regex it's good practice to make your regex string a raw string, with 'r'. Also, putting your entire pattern in parentheses is superfluous.

re.sub(ur'[\u064B-\u0652\u06D4\u0670\u0674\u06D5-\u06ED]+', '', ...)

http://docs.python.org/tutorial/introduction.html#unicode-strings

Edit:

It's also good practice to use the re.UNICODE/re.U/(?u) flag for unicode regexes, but it only affects character class aliases like \w or \b, of which this pattern does not use any and so would not be affected by.

小开

Use unicode strings. Use the re.UNICODE flag.

>>> myre = re.compile(ur'[\u064B-\u0652\u06D4\u0670\u0674\u06D5-\u06ED]+',
re.UNICODE)
>>> myre
<_sre.SRE_Pattern object at 0xb20b378>
>>> mystr = u'بِسْمِ اللَّهِ الرَّحْمَٰنِ الرَّحِيمِ'
>>> result = myre.sub('', mystr)
>>> len(mystr), len(result)
(38, 22)
>>> print result
بسم الله الرحمن الرحيم

Read the article by Joel Spolsky called The Absolute Minimum Every Software Developer Absolutely, Positively Must Know About Unicode and Character Sets (No Excuses!)


提交答案