Use ``functools.cached_property`` on 3.8+ (#5907)

1 files changed, 8 insertions, 1 deletions

diff --git a/pylint/checkers/design_analysis.py b/pylint/checkers/design_analysis.py
index 94569d4ea..37cd16c57 100644
--- a/pylint/checkers/design_analysis.py
+++ b/pylint/checkers/design_analysis.py
@@ -31,6 +31,7 @@
 """Check for signs of poor design."""
 
 import re
+import sys
 from collections import defaultdict
 from typing import TYPE_CHECKING, FrozenSet, Iterator, List, Set, cast
 
@@ -42,6 +43,12 @@ from pylint.checkers import BaseChecker
 from pylint.checkers.utils import check_messages
 from pylint.interfaces import IAstroidChecker
 
+if sys.version_info >= (3, 8) or TYPE_CHECKING:
+    from functools import cached_property
+else:
+    # pylint: disable-next=ungrouped-imports
+    from astroid.decorators import cachedproperty as cached_property
+
 if TYPE_CHECKING:
     from pylint.lint import PyLinter
 
@@ -441,7 +448,7 @@ class MisdesignChecker(BaseChecker):
         for i, _ in enumerate(self._stmts):
             self._stmts[i] += amount
 
-    @astroid.decorators.cachedproperty
+    @cached_property
     def _ignored_argument_names(self):
         return utils.get_global_option(self, "ignored-argument-names", default=None)