python: drop Python 2 support

Python 2.7 reached the end of its life on January 1st, 2020 [1]. Since
it would be a waste to ignore several Python 3.x features in master
discovery implementation, we decided to drop Python 2 support here.

Python 2 workaround cleanup activities are expected to be solved as
part of #212 solution.

1. https://www.python.org/doc/sunset-python-2/

Part of #196

Author: DifferentialOrange

.github/workflows/testing.yml

@@ -24,7 +24,6 @@ jobs:
           - '2.8'
           - '2.x-latest'
         python:
-          - '2.7'
           - '3.5'
           - '3.6'
           - '3.7'
@@ -116,7 +115,6 @@ jobs:
           - '1.10'
           - '2.8'
         python:
-          - '2.7'
           - '3.10'
 
     steps:

CHANGELOG.md

@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   (PR #192).
 
 ### Changed
+- **Breaking**: drop Python 2 support (PR #207).
 - **Breaking**: change binary types encode/decode for Python 3
   to support working with varbinary (PR #211, #105).
   With Python 2 the behavior of the connector remains the same.

setup.py

@@ -84,5 +84,6 @@ def find_version(*file_paths):
     command_options=command_options,
     install_requires=[
         'msgpack>=0.4.0',
-    ]
+    ],
+    python_requires='>=3',
 )

test/suites/lib/skip.py

@@ -80,12 +80,3 @@ def skip_or_run_varbinary_test(func):
     return skip_or_run_test_tarantool(func, '2.2.1',
                                       'does not support VARBINARY type')
 
-
-def skip_or_run_mp_bin_test(func):
-    """Decorator to skip or run mp_bin-related tests depending on
-    the Python version.
-
-    Python 2 connector do not support mp_bin.
-    """
-
-    return skip_or_run_test_python_major(func, 3, 'does not support mp_bin')

test/suites/test_encoding.py

@@ -6,7 +6,7 @@
 import unittest
 import tarantool
 
-from .lib.skip import skip_or_run_mp_bin_test, skip_or_run_varbinary_test
+from .lib.skip import skip_or_run_varbinary_test
 from .lib.tarantool_server import TarantoolServer
 
 class TestSuite_Encoding(unittest.TestCase):
@@ -99,7 +99,6 @@ def test_01_02_string_decode_for_encoding_utf8_behavior(self):
         resp = self.con_encoding_utf8.eval("return box.space['%s']:get('%s')" % (space, data))
         self.assertSequenceEqual(resp, [[data]])
 
-    @skip_or_run_mp_bin_test
     @skip_or_run_varbinary_test
     def test_01_03_bytes_encode_for_encoding_utf8_behavior(self):
         data_id = 103
@@ -111,7 +110,6 @@ def test_01_03_bytes_encode_for_encoding_utf8_behavior(self):
         resp = self.con_encoding_utf8.select(space, [ data ], index='varbin')
         self.assertSequenceEqual(resp, [[data_id, data]])
 
-    @skip_or_run_mp_bin_test
     @skip_or_run_varbinary_test
     def test_01_04_varbinary_decode_for_encoding_utf8_behavior(self):
         data_id = 104
@@ -162,7 +160,6 @@ def test_02_03_bytes_encode_for_encoding_none_behavior(self):
         resp = self.con_encoding_none.select(space, [data])
         self.assertSequenceEqual(resp, [[data]])
 
-    @skip_or_run_mp_bin_test
     @skip_or_run_varbinary_test
     def test_02_04_varbinary_decode_for_encoding_none_behavior(self):
         data_id = 204