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, 1 insertions, 2 deletions

diff --git a/tests/test_scripting.py b/tests/test_scripting.py
index b3d52a5..02c0f17 100644
--- a/tests/test_scripting.py
+++ b/tests/test_scripting.py
@@ -1,4 +1,3 @@
-from __future__ import unicode_literals
 import pytest
 
 from redis import exceptions
@@ -21,7 +20,7 @@ return "hello " .. name
 """
 
 
-class TestScripting(object):
+class TestScripting:
     @pytest.fixture(autouse=True)
     def reset_scripts(self, r):
         r.script_flush()