DeprecationWarning: Flags not at the start of the expression '\\\\Aqu..*\\\\Z(?s)'"

[Takashi Natsume]

In unit tests on python 3 (3.6 and python 3.7), the following warning is output.

2019-06-10 05:13:23.883288 | ubuntu-bionic | {3} nova.tests.unit.test_utils.ResourceFilterTestCase.test_filter_and_format_resource_metadata [0.022234s] ... ok
2019-06-10 05:13:23.883384 | ubuntu-bionic |
2019-06-10 05:13:23.883420 | ubuntu-bionic | Captured stderr:
2019-06-10 05:13:23.883449 | ubuntu-bionic | ~~~~~~~~~~~~~~~~
2019-06-10 05:13:23.883580 | ubuntu-bionic | b"/home/zuul/src/opendev.org/openstack/nova/nova/utils.py:1039: DeprecationWarning: Flags not at the start of the expression '\\\\Aqu..*\\\\Z(?s)'"
2019-06-10 05:13:23.883631 | ubuntu-bionic | b' for pattern in pattern_list])'
2019-06-10 05:13:23.883658 | ubuntu-bionic | b''

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/665065

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/665065
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=75a1ba27226c340b8fb30ce667a90a184d6ac864
Submitter: Zuul
Branch: master

commit 75a1ba27226c340b8fb30ce667a90a184d6ac864
Author: Takashi NATSUME <email address hidden>
Date: Thu Jun 13 14:56:35 2019 +0900

    Fix a warning about flags in an expression string

    In python 3, flags should be used first in the expression string.
    So fix an expression string in a unit test.

    *: https://docs.python.org/3/library/re.html#regular-expression-syntax

    Change-Id: I7af958ffb615979a0bad9c8f56a33256ed305aa2
    Closes-Bug: #1832670

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/nova 20.0.0.0rc1 release candidate.