New submission from Alessandro Moura: This is related to issue 15826.
When run with the -b option, some glob.py and os.py functions give warnings due to byte-to-string conversions: amoura@amoura-laptop:~/cpython$ ./python -b -c "import glob; glob.glob(b'cover*/glob.cover')" /home/amoura/cpython/Lib/glob.py:64: BytesWarning: Comparison between bytes and string if basename == '': amoura@amoura-laptop:~/cpython$ ./python -b -c "import os; os.makedirs(b'tst/making/dirs')" /home/amoura/cpython/Lib/os.py:266: BytesWarning: Comparison between bytes and string if tail == cdir: # xxx/newdir/. exists if xxx/newdir exists The attached patch fixes this. There is a rather more mysterious phenomenon with exceptions (which is triggered by test_exceptions for ImportException, but it happens for any Exception class): >>> e = Exception(b'aaa') [60596 refs] >>> e.args[0] b'aaa' [60601 refs] >>> str(e) __main__:1: BytesWarning: str() on a bytes instance "b'aaa'" [60615 refs] >>> e.args[0] b'aaa' [60615 refs] >>> str(e) "b'aaa'" [60615 refs] >>> e.args[0] b'aaa' [60615 refs] In other words, if a bytes argument is given to the exception, the first call to str triggers the warning, but further calls don't. Is this worth pursuing? ---------- components: Library (Lib) files: os_glob_bytes.patch keywords: patch messages: 169683 nosy: eng793 priority: normal severity: normal status: open title: Fixing some byte-to-string conversion warnings type: enhancement versions: Python 3.3 Added file: http://bugs.python.org/file27092/os_glob_bytes.patch _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue15845> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
