Python 3 preparation: update calls to dict methods. Tool-assisted patch. Changes of iterkeys / itervalues / iteritems to keys / values / items are fully automated, but may make things less efficient in Python 2. Automated tools want to add list() around many calls to keys / values / items, but I thought most such list() additions were unnecessary because it seemed the result of keys / values / items was just iterated over while the set of dict keys remained unchanged, rather than used in a way requiring an actual list, or used while the set of keys in the dict could change. It's quite possible I missed some cases where list() was really needed, or left in some unnecessary list() calls. In cases where list() was only needed because the resulting list was then sorted in-place, I changed the code to use calls to sorted().

# misc tests

import unittest
from roundup.cgi.accept_language import parse

class AcceptLanguageTest(unittest.TestCase):
    def testParse(self):
        self.assertEqual(parse("da, en-gb;q=0.8, en;q=0.7"),
                         ['da', 'en_gb', 'en'])
        self.assertEqual(parse("en;q=0.2, fr;q=1"), ['fr', 'en'])
        self.assertEqual(parse("zn; q = 0.2 ,pt-br;q =1"), ['pt_br', 'zn'])
        self.assertEqual(parse("es-AR"), ['es_AR'])
        self.assertEqual(parse("es-es-cat"), ['es_es_cat'])
        self.assertEqual(parse(""), [])
        self.assertEqual(parse(None),[])
        self.assertEqual(parse("   "), [])
        self.assertEqual(parse("en,"), ['en'])