Must import sre_constants to catch re.compile errors.

[jemfinch]

BPO	795379

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assignee = None
closed_at = <Date 2003-08-26.17:10:05.000>
created_at = <Date 2003-08-26.14:19:27.000>
labels = ['expert-regex']
title = 'Must import sre_constants to catch re.compile errors.'
updated_at = <Date 2003-08-26.17:10:05.000>
user = 'https://bugs.python.org/jemfinch'

bugs.python.org fields:

activity = <Date 2003-08-26.17:10:05.000>
actor = 'jemfinch'
assignee = 'effbot'
closed = True
closed_date = None
closer = None
components = ['Regular Expressions']
creation = <Date 2003-08-26.14:19:27.000>
creator = 'jemfinch'
dependencies = []
files = []
hgrepos = []
issue_num = 795379
keywords = []
message_count = 3.0
messages = ['17954', '17955', '17956']
nosy_count = 2.0
nosy_names = ['effbot', 'jemfinch']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue795379'
versions = []

[jemfinch]

It's a bit frustrating not to be able to catch
exceptions raised by re.compile with just the re
module. The fact that sre_constants.error is
raised is a bit too much implementation showing
through, IMO.

Anyway, I suggest a exception be added to the re
module that subclasses sre_constants.error for
backwards compatibility. So users can simply
import re and catch re.error instead of having to
import re and sre_constants and catch
sre_constants.error.

[effbot]

Logged In: YES
user_id=38376

afaik, the following has worked since 1.6, and still works
in 2.3:

>>> import re
>>> try:
...     re.compile("[]*")
... except re.error:
...     print "oops"
...
oops

what Python version are you using?

[jemfinch]

Logged In: YES
user_id=99508

Oops, my fault.