Barry A. Warsaw added the comment:
On Nov 22, 2016, at 04:13 PM, Serhiy Storchaka wrote:
>Could Mailman be fixed? Undefined combinations of \ + ASCII emitted warnings
>in 3.5. And now they emit warnings even just in string literals
>(issue27364). If Mailman use undefined escape combinations, it could suffer
>from issue27364 too.
No, I think this is a valid bug/regression.
The Mailman code is basically trying to do this:
p = re.compile('%\d*d')
p.sub(r'\s*\d+\s*', some_string)
And so we get the error:
sre_constants.error: bad escape \s at position 0
But this directly contradicts the documentation for re.sub():
"... if it is a string, any backslash escapes in it are processed. That is, \n
is converted to a single newline character, \r is converted to a carriage
return, and so forth. Unknown escapes such as \& are left alone."
Clearly \s is not being left alone, so this is a real regression.
----------
_______________________________________
Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue27030>
_______________________________________
_______________________________________________
Python-bugs-list mailing list
Unsubscribe:
https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
