Remove support for end-of-life Python 2.7 (#1318)

Remove support for end-of-life Python 2.7

Python 2.7 is end of life. It is no longer receiving bug fixes,
including for security issues. Python 2.7 went EOL on 2020-01-01. For
additional details on support Python versions, see:

Supported: https://devguide.python.org/#status-of-python-branches
EOL: https://devguide.python.org/devcycle/#end-of-life-branches

Removing support for EOL Pythons will reduce testing and maintenance
resources while allowing the library to move towards a modern Python 3
style. Python 2.7 users can continue to use the previous version of
redis-py.

Was able to simplify the code:

- Removed redis._compat module
- Removed __future__ imports
- Removed object from class definition (all classes are new style)
- Removed long (Python 3 unified numeric types)
- Removed deprecated __nonzero__ method
- Use simpler Python 3 super() syntax
- Use unified OSError exception
- Use yield from syntax

Co-authored-by: Andy McCurdy <andy@andymccurdy.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/tests/test_lock.py b/tests/test_lock.py
index e8bd874..8bb3c7e 100644
--- a/tests/test_lock.py
+++ b/tests/test_lock.py
@@ -7,7 +7,7 @@ from redis.lock import Lock
 from .conftest import _get_client
 
 
-class TestLock(object):
+class TestLock:
     @pytest.fixture()
     def r_decoded(self, request):
         return _get_client(Redis, request=request, decode_responses=True)
@@ -220,9 +220,9 @@ class TestLock(object):
             lock.reacquire()
 
 
-class TestLockClassSelection(object):
+class TestLockClassSelection:
     def test_lock_class_argument(self, r):
-        class MyLock(object):
+        class MyLock:
             def __init__(self, *args, **kwargs):
 
                 pass