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, 2 insertions, 3 deletions

diff --git a/benchmarks/base.py b/benchmarks/base.py
index 44e9341..8c13afe 100644
--- a/benchmarks/base.py
+++ b/benchmarks/base.py
@@ -3,10 +3,9 @@ import itertools
 import redis
 import sys
 import timeit
-from redis._compat import izip
 
 
-class Benchmark(object):
+class Benchmark:
     ARGUMENTS = ()
 
     def __init__(self):
@@ -34,7 +33,7 @@ class Benchmark(object):
         group_names = [group['name'] for group in self.ARGUMENTS]
         group_values = [group['values'] for group in self.ARGUMENTS]
         for value_set in itertools.product(*group_values):
-            pairs = list(izip(group_names, value_set))
+            pairs = list(zip(group_names, value_set))
             arg_string = ', '.join(['%s=%s' % (p[0], p[1]) for p in pairs])
             sys.stdout.write('Benchmark: %s... ' % arg_string)
             sys.stdout.flush()