bpo-39916: Use os.scandir() as context manager in Path.glob(). (GH-18880)

Author: serhiy-storchaka

Lib/pathlib.py

@@ -527,7 +527,8 @@ def __init__(self, pat, child_parts, flavour):
 
     def _select_from(self, parent_path, is_dir, exists, scandir):
         try:
-            entries = list(scandir(parent_path))
+            with scandir(parent_path) as scandir_it:
+                entries = list(scandir_it)
             for entry in entries:
                 if self.dironly:
                     try:
@@ -557,7 +558,8 @@ def __init__(self, pat, child_parts, flavour):
     def _iterate_directories(self, parent_path, is_dir, scandir):
         yield parent_path
         try:
-            entries = list(scandir(parent_path))
+            with scandir(parent_path) as scandir_it:
+                entries = list(scandir_it)
             for entry in entries:
                 entry_is_dir = False
                 try:

Misc/NEWS.d/next/Library/2020-03-09-18-56-27.bpo-39916.BHHyp3.rst

@@ -0,0 +1,2 @@
+More reliable use of ``os.scandir()`` in ``Path.glob()``. It no longer emits
+a ResourceWarning when interrupted.