New submission from Joshua J Cogliati: The -3 option should warn about str to bytes conversions and str to bytes comparisons: For example in Python 3 the following happens:
python3 Python 3.3.2 <snip> Type "help", "copyright", "credits" or "license" for more information. >>> b"a" + "a" Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: can't concat bytes to str >>> b"a" == "a" False >>> But even python2 -3 does not warn about either of these uses: python2 -3 Python 2.7.5 <snip> Type "help", "copyright", "credits" or "license" for more information. >>> b"a" + "a" 'aa' >>> b"a" == "a" True >>> u"a" + "a" u'aa' >>> u"a" == "a" True >>> These two issues are some of the more significant problems I have in trying get python2 code working with python3, and if -3 does not warn about it this is harder to do. ---------- components: Unicode messages: 217633 nosy: Joshua.J.Cogliati, ezio.melotti, haypo priority: normal severity: normal status: open title: python2 -3 does not warn about str to bytes conversions and comparisons versions: Python 2.7 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue21401> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
