From 1877565d4dc1582771d677954f40fe8e60bdc590 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Herv=C3=A9=20Beraud?= <hberaud@redhat.com>
Date: Tue, 2 Jun 2020 21:00:56 +0200
Subject: [PATCH] Stop to use the __future__ module.

The __future__ module [1] was used in this context to ensure compatibility
between python 2 and python 3.

We previously dropped the support of python 2.7 [2] and now we only support
python 3 so we don't need to continue to use this module and the imports
listed below.

Imports commonly used and their related PEPs:
- `division` is related to PEP 238 [3]
- `print_function` is related to PEP 3105 [4]
- `unicode_literals` is related to PEP 3112 [5]
- `with_statement` is related to PEP 343 [6]
- `absolute_import` is related to PEP 328 [7]

[1] https://docs.python.org/3/library/__future__.html
[2] https://governance.openstack.org/tc/goals/selected/ussuri/drop-py27.html
[3] https://www.python.org/dev/peps/pep-0238
[4] https://www.python.org/dev/peps/pep-3105
[5] https://www.python.org/dev/peps/pep-3112
[6] https://www.python.org/dev/peps/pep-0343
[7] https://www.python.org/dev/peps/pep-0328

Change-Id: Ie7c18f2f1b6294e3d19c36112d35f4472ce77e7b
---
 taskflow/listeners/base.py                              | 2 --
 taskflow/listeners/claims.py                            | 2 --
 taskflow/listeners/logging.py                           | 2 --
 taskflow/listeners/printing.py                          | 2 --
 taskflow/listeners/timing.py                            | 2 --
 taskflow/logging.py                                     | 2 --
 taskflow/persistence/backends/impl_sqlalchemy.py        | 2 --
 taskflow/persistence/backends/sqlalchemy/alembic/env.py | 2 --
 taskflow/test.py                                        | 2 --
 9 files changed, 18 deletions(-)

diff --git a/taskflow/listeners/base.py b/taskflow/listeners/base.py
index 4d2edf504..f5113a4e6 100644
--- a/taskflow/listeners/base.py
+++ b/taskflow/listeners/base.py
@@ -14,8 +14,6 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from __future__ import absolute_import
-
 import abc
 
 from oslo_utils import excutils
diff --git a/taskflow/listeners/claims.py b/taskflow/listeners/claims.py
index ae8aabf06..dac74ce41 100644
--- a/taskflow/listeners/claims.py
+++ b/taskflow/listeners/claims.py
@@ -14,8 +14,6 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from __future__ import absolute_import
-
 import logging
 import os
 
diff --git a/taskflow/listeners/logging.py b/taskflow/listeners/logging.py
index 6ea2ee10a..441a13ed0 100644
--- a/taskflow/listeners/logging.py
+++ b/taskflow/listeners/logging.py
@@ -14,8 +14,6 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from __future__ import absolute_import
-
 import os
 
 from taskflow import formatters
diff --git a/taskflow/listeners/printing.py b/taskflow/listeners/printing.py
index 2a89b1794..8a690c3ca 100644
--- a/taskflow/listeners/printing.py
+++ b/taskflow/listeners/printing.py
@@ -14,8 +14,6 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from __future__ import print_function
-
 import sys
 import traceback
 
diff --git a/taskflow/listeners/timing.py b/taskflow/listeners/timing.py
index d8a731205..8634ee00a 100644
--- a/taskflow/listeners/timing.py
+++ b/taskflow/listeners/timing.py
@@ -14,8 +14,6 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from __future__ import absolute_import
-
 import itertools
 import six
 import time
diff --git a/taskflow/logging.py b/taskflow/logging.py
index 849c99251..7c700f8b9 100644
--- a/taskflow/logging.py
+++ b/taskflow/logging.py
@@ -14,8 +14,6 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from __future__ import absolute_import
-
 import logging
 
 _BASE = __name__.split(".", 1)[0]
diff --git a/taskflow/persistence/backends/impl_sqlalchemy.py b/taskflow/persistence/backends/impl_sqlalchemy.py
index 19b3b20b7..2dbe6ff32 100644
--- a/taskflow/persistence/backends/impl_sqlalchemy.py
+++ b/taskflow/persistence/backends/impl_sqlalchemy.py
@@ -15,8 +15,6 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from __future__ import absolute_import
-
 import contextlib
 import copy
 import functools
diff --git a/taskflow/persistence/backends/sqlalchemy/alembic/env.py b/taskflow/persistence/backends/sqlalchemy/alembic/env.py
index 4e0a3ebf9..2094fe459 100644
--- a/taskflow/persistence/backends/sqlalchemy/alembic/env.py
+++ b/taskflow/persistence/backends/sqlalchemy/alembic/env.py
@@ -13,8 +13,6 @@
 #    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 #    License for the specific language governing permissions and limitations
 #    under the License.
-
-from __future__ import with_statement
 from alembic import context
 from sqlalchemy import engine_from_config, pool
 
diff --git a/taskflow/test.py b/taskflow/test.py
index ace97fc1c..2b1678df3 100644
--- a/taskflow/test.py
+++ b/taskflow/test.py
@@ -14,8 +14,6 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from __future__ import absolute_import
-
 import collections
 import logging