message_about_scripts_not_on_PATH: use pathlib also for parent_dir an…

…d script_name directly

src/pip/_internal/operations/install/wheel.py

@@ -138,8 +138,8 @@ def message_about_scripts_not_on_PATH(scripts: Sequence[str]) -> Optional[str]:
     # Group scripts by the path they were installed in
     grouped_by_dir: Dict[str, Set[str]] = collections.defaultdict(set)
     for destfile in scripts:
-        parent_dir = os.path.dirname(destfile)
-        script_name = os.path.basename(destfile)
+        parent_dir = Path(destfile).parent.resolve()
+        script_name = Path(destfile).name
         grouped_by_dir[parent_dir].add(script_name)
 
     # We don't want to warn for directories that are on PATH.
@@ -152,7 +152,7 @@ def message_about_scripts_not_on_PATH(scripts: Sequence[str]) -> Optional[str]:
     warn_for: Dict[str, Set[str]] = {
         parent_dir: scripts
         for parent_dir, scripts in grouped_by_dir.items()
-        if Path(parent_dir).resolve() not in not_warn_dirs
+        if parent_dir not in not_warn_dirs
     }
     if not warn_for:
         return None