From 8871c7285fc097fd1bf713aa184cba7e2804f625 Mon Sep 17 00:00:00 2
001                                                                
From: Bas van Beek <b.f.van.beek@vu.nl>
Date: Wed, 10 Nov 2021 15:36:00 +0100
Subject: [PATCH] MAINT: Do not forward `__(deep)copy__` calls of
 `_GenericAlias` to the wrapped type
  
Adapt to the python 3.9.8 changes made in bpo-45167.

---
 numpy/typing/_generic_alias.py           |  2 ++
 numpy/typing/tests/test_generic_alias.py | 16 ++++++++++++++++
 2 files changed, 18 insertions(+)

diff --git a/numpy/typing/_generic_alias.py b/numpy/typing/_generic_alias.py
index 6852382..4195cd9 100644
--- a/numpy/typing/_generic_alias.py
+++ b/numpy/typing/_generic_alias.py
@@ -178,6 +178,8 @@ class _GenericAlias:
         "__mro_entries__",
         "__reduce__",
         "__reduce_ex__",
+        "__copy__",
+        "__deepcopy__",
     })
 
     def __getattribute__(self, name: str) -> Any:
diff --git a/numpy/typing/tests/test_generic_alias.py b/numpy/typing/tests/test_generic_alias.py
index 5f0ac91..35c0da3 100644
--- a/numpy/typing/tests/test_generic_alias.py
+++ b/numpy/typing/tests/test_generic_alias.py
@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import sys
+import copy
 import types
 import pickle
 import weakref
@@ -74,6 +75,21 @@ class TestGenericAlias:
             value_ref = func(NDArray_ref)
             assert value == value_ref
 
+    @pytest.mark.parametrize("name,func", [
+        ("__copy__", lambda n: n == copy.copy(n)),
+        ("__deepcopy__", lambda n: n == copy.deepcopy(n)),
+    ])
+    def test_copy(self, name: str, func: FuncType) -> None:
+        value = func(NDArray)
+
+        # xref bpo-45167
+        GE_398 = (
+            sys.version_info[:2] == (3, 9) and sys.version_info >= (3, 9, 8)
+        )
+        if GE_398 or sys.version_info >= (3, 10, 1):
+            value_ref = func(NDArray_ref)
+            assert value == value_ref
+
     def test_weakref(self) -> None:
         """Test ``__weakref__``."""
         value = weakref.ref(NDArray)()
-- 
2.27.0

