cinderclient.exceptions.ClientException fails on py34 if message is not provided

[Matt Riedemann]

This fails on python 3.4 if the message kwarg evaluates to False:

http://git.openstack.org/cgit/openstack/python-cinderclient/tree/cinderclient/exceptions.py?id=1.1.2#n85

because self.__class__.message doesn't exist for exceptions in python 3.4.

You can see the failure here in a unit test that hit this:

http://logs.openstack.org/50/209150/2/check/gate-python-cinderclient-python34/18f034e/console.html#_2015-08-04_19_38_16_567

2015-08-04 19:38:16.567 | FAIL: cinderclient.tests.unit.test_exceptions.ExceptionsTest.test_from_response_no_body_message
2015-08-04 19:38:16.567 | tags: worker-3
2015-08-04 19:38:16.567 | ----------------------------------------------------------------------
2015-08-04 19:38:16.567 | Empty attachments:
2015-08-04 19:38:16.567 | stderr
2015-08-04 19:38:16.567 | stdout
2015-08-04 19:38:16.568 |
2015-08-04 19:38:16.568 | Traceback (most recent call last):
2015-08-04 19:38:16.568 | File "/home/jenkins/workspace/gate-python-cinderclient-python34/cinderclient/tests/unit/test_exceptions.py", line 31, in test_from_response_no_body_message
2015-08-04 19:38:16.568 | ex = exceptions.from_response(response, body)
2015-08-04 19:38:16.568 | File "/home/jenkins/workspace/gate-python-cinderclient-python34/cinderclient/exceptions.py", line 207, in from_response
2015-08-04 19:38:16.568 | request_id=request_id)
2015-08-04 19:38:16.568 | File "/home/jenkins/workspace/gate-python-cinderclient-python34/cinderclient/exceptions.py", line 91, in __init__
2015-08-04 19:38:16.568 | self.message = message or self.__class__.message
2015-08-04 19:38:16.568 | AttributeError: type object 'ClientException' has no attribute 'message'

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/209258

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/209258
Committed: https://git.openstack.org/cgit/openstack/python-cinderclient/commit/?id=03542ee65a5e818a5d908a85a6a9eba21ef63b53
Submitter: Jenkins
Branch: master

commit 03542ee65a5e818a5d908a85a6a9eba21ef63b53
Author: Matt Riedemann <email address hidden>
Date: Tue Aug 4 14:20:53 2015 -0700

    Fix ClientException init when there is no message on py34

    BaseException.message was removed in python 3 per PEP 0352 so if no
    message is passed to the ClientException __init__ it will blow up:

    AttributeError: type object 'ClientException' has no attribute 'message'

    So this change does two things:

    1. Default to 'n/a' for message and details when body['keys'] doesn't
       have a message or details in it (which should be fine since
       from_response defaults to n/a if 'keys' is not in body).
    2. Use getattr for self.__class__.message and default to None if that
       attribute is not set. Arguably we could just remove this and make
       the message kwarg default to 'n/a' in ClientException.__init__ but
       I figured that was more invasive.

    Closes-Bug: #1481478

    Change-Id: I738cb9c8d4f015048c45a1df16bf18e29190e392

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/python-cinderclient 1.4.0 release.