Hi all, trying out pgcli with Python 3.6.0b2 I got an error related to what seem a different behaviour, or even a bug, of re.sub().
The original intent is to replace spaces within a string with the regular expression \s+ (see https://github.com/dbcli/pgcli/blob/master/pgcli/packages/prioritization.py#L11, ignore the fact that the re.sub() call seem underoptimal). With Python 3.5.2 is straightforward: $ python3.5 Python 3.5.2+ (default, Sep 22 2016, 12:18:14) [GCC 6.2.0 20160927] on linux Type "help", "copyright", "credits" or "license" for more information. >>> import re >>> re.sub(r'\s+', r'\s+', 'foo bar') 'foo\\s+bar' While Python 3.6.0b2 gives: $ python3.6 Python 3.6.0b2+ (default, Oct 11 2016, 08:30:05) [GCC 6.2.0 20160927] on linux Type "help", "copyright", "credits" or "license" for more information. >>> import re >>> re.sub(r'\s+', r'\s+', 'foo bar') Traceback (most recent call last): File "/usr/local/python3.6/lib/python3.6/sre_parse.py", line 945, in parse_template this = chr(ESCAPES[this][1]) KeyError: '\\s' During handling of the above exception, another exception occurred: Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/usr/local/python3.6/lib/python3.6/re.py", line 191, in sub return _compile(pattern, flags).sub(repl, string, count) File "/usr/local/python3.6/lib/python3.6/re.py", line 326, in _subx template = _compile_repl(template, pattern) File "/usr/local/python3.6/lib/python3.6/re.py", line 317, in _compile_repl return sre_parse.parse_template(repl, pattern) File "/usr/local/python3.6/lib/python3.6/sre_parse.py", line 948, in parse_template raise s.error('bad escape %s' % this, len(this)) sre_constants.error: bad escape \s at position 0 Accordingly to the documentation (https://docs.python.org/3.6/library/re.html#re.sub) “unknown escapes [in the repl argument] such as \& are left alone”. Am I missing something, or is this a regression? In the meantime, I will alert the pgcli people. Thanks in advance, bye, lele. -- nickname: Lele Gaifax | Quando vivrò di quello che ho pensato ieri real: Emanuele Gaifas | comincerò ad aver paura di chi mi copia. l...@metapensiero.it | -- Fortunato Depero, 1929. -- https://mail.python.org/mailman/listinfo/python-list
