Create a constant for version check and refactor existing one

Author: Pierre-Sassoulas

pylint/checkers/utils.py

@@ -50,7 +50,6 @@
 import numbers
 import re
 import string
-import sys
 from functools import lru_cache, partial
 from typing import Callable, Dict, Iterable, List, Match, Optional, Set, Tuple, Union
 
@@ -60,6 +59,8 @@
 from astroid import helpers, scoped_nodes
 from astroid.exceptions import _NonDeducibleTypeHierarchy
 
+from pylint.constants import PY310_PLUS
+
 BUILTINS_NAME = builtins.__name__
 COMP_NODE_TYPES = (
     astroid.ListComp,
@@ -213,7 +214,6 @@
     for name in methods  # type: ignore
 }
 PYMETHODS = set(SPECIAL_METHODS_PARAMS)
-PY310_PLUS = sys.version_info[:2] >= (3, 10)
 
 
 class NoSuchArgumentError(Exception):

pylint/constants.py

@@ -7,6 +7,10 @@
 
 from pylint.__pkginfo__ import version as pylint_version
 
+PY38_PLUS = sys.version_info[:2] >= (3, 8)
+PY310_PLUS = sys.version_info[:2] >= (3, 10)
+
+
 PY_EXTS = (".py", ".pyc", ".pyo", ".pyw", ".so", ".dll")
 
 MSG_STATE_CONFIDENCE = 2

pylint/testutils/output_line.py

@@ -2,9 +2,9 @@
 # For details: https://github.com/PyCQA/pylint/blob/master/COPYING
 
 import collections
-import sys
 
 from pylint import interfaces
+from pylint.constants import PY38_PLUS
 from pylint.testutils.constants import UPDATE_OPTION
 
 
@@ -80,7 +80,7 @@ def from_msg(cls, msg):
 
     @classmethod
     def get_column(cls, column):
-        if sys.version_info.major == 3 and sys.version_info.minor < 8:
+        if not PY38_PLUS:
             return ""
         return str(column)