[FIXED] Python and regular expression with Unicode

Issue

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?

Solution

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.

Answered By - ʞɔıu