New submission from Roy Smith:
>>> re.compile('(?P=<foo>)')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/roy/env/python/lib/python2.7/re.py", line 190, in compile
return _compile(pattern, flags)
File "/home/roy/env/python/lib/python2.7/re.py", line 242, in _compile
raise error, v # invalid expression
sre_constants.error: bad character in group name
The error here is that I put a "=" where it shouldn't be. The error message is
misleading. The "group name" is the stuff between the <>'s. That part's fine.
What's broken is the stuff outside of the <>'s.
Unclear if it's reasonable to expect such precise error reporting here, but
this one seems particularly misleading, so opening a ticket to record the
observation.
----------
components: Regular Expressions
messages: 183375
nosy: ezio.melotti, mrabarnett, roysmith
priority: normal
severity: normal
status: open
title: Poor error message when compiling invalid regex
type: behavior
versions: Python 2.7
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue17341>
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