[3.7] bpo-38878: Fix os.PathLike __subclasshook__ (GH-17336) (GH-17685)

https://bugs.python.org/issue38878

1 files changed, 5 insertions, 1 deletions

diff --git a/Lib/os.py b/Lib/os.py
index b93f95d..9853e37 100644
--- a/Lib/os.py
+++ b/Lib/os.py
@@ -26,6 +26,8 @@ import abc
 import sys
 import stat as st
 
+from _collections_abc import _check_methods
+
 _names = sys.builtin_module_names
 
 # Note:  more names are added to __all__ later.
@@ -1076,4 +1078,6 @@ class PathLike(abc.ABC):
 
     @classmethod
     def __subclasshook__(cls, subclass):
-        return hasattr(subclass, '__fspath__')
+        if cls is PathLike:
+            return _check_methods(subclass, '__fspath__')
+        return NotImplemented