matching unicode characters in python regular expressions

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You need to specify the re.UNICODE flag, and input your string as a Unicode string by using the u prefix:

>>> re.match(r'^/by_tag/(?P<tag>\w+)/(?P<filename>(\w|[.,!#%{}()@])+)$', u'/by_tag/påske/øyfjell.jpg', re.UNICODE).groupdict()
{'tag': u'p\xe5ske', 'filename': u'\xf8yfjell.jpg'}

This is in Python 2; in Python 3 you must leave out the u because all strings are Unicode, and you can leave off the re.UNICODE flag.

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