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, 9 deletions

diff --git a/benchmarks/basic_operations.py b/benchmarks/basic_operations.py
index a4b675d..9446343 100644
--- a/benchmarks/basic_operations.py
+++ b/benchmarks/basic_operations.py
@@ -1,13 +1,8 @@
-from __future__ import print_function
 import redis
 import time
-import sys
 from functools import wraps
 from argparse import ArgumentParser
 
-if sys.version_info[0] == 3:
-    long = int
-
 
 def parse_args():
     parser = ArgumentParser()
@@ -47,9 +42,9 @@ def run():
 def timer(func):
     @wraps(func)
     def wrapper(*args, **kwargs):
-        start = time.clock()
+        start = time.monotonic()
         ret = func(*args, **kwargs)
-        duration = time.clock() - start
+        duration = time.monotonic() - start
         if 'num' in kwargs:
             count = kwargs['num']
         else:
@@ -57,7 +52,7 @@ def timer(func):
         print('{} - {} Requests'.format(func.__name__, count))
         print('Duration  = {}'.format(duration))
         print('Rate = {}'.format(count/duration))
-        print('')
+        print()
         return ret
     return wrapper
 
@@ -185,7 +180,6 @@ def hmset(conn, num, pipeline_size, data_size):
 
     set_data = {'str_value': 'string',
                 'int_value': 123456,
-                'long_value': long(123456),
                 'float_value': 123456.0}
     for i in range(num):
         conn.hmset('hmset_key', set_data)