Changed code to support older Python versions

venv/lib/python3.11/site-packages/dns/_tls_util.py

@@ -0,0 +1,19 @@
+# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license
+
+import os
+from typing import Tuple
+
+
+def convert_verify_to_cafile_and_capath(
+    verify: bool | str,
+) -> Tuple[str | None, str | None]:
+    cafile: str | None = None
+    capath: str | None = None
+    if isinstance(verify, str):
+        if os.path.isfile(verify):
+            cafile = verify
+        elif os.path.isdir(verify):
+            capath = verify
+        else:
+            raise ValueError("invalid verify string")
+    return cafile, capath