Python and regular expression with Unicode

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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.

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