I need to delete some Unicode symbols from the string 'بِسْمِ اللَّهِ الرَّحْمَٰنِ الرَّحِيمِ'
I know they exist here for sure. I tried:
re.sub('([\u064B-\u0652\u06D4\u0670\u0674\u06D5-\u06ED]+)', '', 'بِسْمِ اللَّهِ الرَّحْمَٰنِ الرَّحِيمِ')
but it doesn't work. String stays the same. What am I doing wrong?
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]+', '', ...)
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.
>>> 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!)