diff --git a/Lib/enum.py b/Lib/enum.py
index 4261b117d9db23..ee32d5d4e058bc 100644
--- a/Lib/enum.py
+++ b/Lib/enum.py
@@ -1369,6 +1369,9 @@ class Flag(Enum, boundary=STRICT):
Support for flags
"""
+ def __reduce_ex__(self, proto):
+ return self.__class__, (self._value_, )
+
_numeric_repr_ = repr
def _generate_next_value_(name, start, count, last_values):
diff --git a/Lib/test/test_enum.py b/Lib/test/test_enum.py
index 25b3e2d818929b..28594b010d80d3 100644
--- a/Lib/test/test_enum.py
+++ b/Lib/test/test_enum.py
@@ -1,3 +1,4 @@
+import copy
import enum
import doctest
import inspect
@@ -734,6 +735,13 @@ def test_format_specs(self):
self.assertFormatIsValue('{:5.2}', TE.third)
self.assertFormatIsValue('{:f}', TE.third)
+ def test_copy(self):
+ TE = self.MainEnum
+ copied = copy.copy(TE)
+ self.assertEqual(copied, TE)
+ deep = copy.deepcopy(TE)
+ self.assertEqual(deep, TE)
+
class _FlagTests:
@@ -2654,6 +2662,26 @@ class MyIntFlag(int, Flag):
self.assertTrue(isinstance(MyIntFlag.ONE | MyIntFlag.TWO, MyIntFlag), MyIntFlag.ONE | MyIntFlag.TWO)
self.assertTrue(isinstance(MyIntFlag.ONE | 2, MyIntFlag))
+ def test_int_flags_copy(self):
+ class MyIntFlag(IntFlag):
+ ONE = 1
+ TWO = 2
+ FOUR = 4
+
+ flags = MyIntFlag.ONE | MyIntFlag.TWO
+ copied = copy.copy(flags)
+ deep = copy.deepcopy(flags)
+ self.assertEqual(copied, flags)
+ self.assertEqual(deep, flags)
+
+ flags = MyIntFlag.ONE | MyIntFlag.TWO | 8
+ copied = copy.copy(flags)
+ deep = copy.deepcopy(flags)
+ self.assertEqual(copied, flags)
+ self.assertEqual(deep, flags)
+ self.assertEqual(copied.value, 1 | 2 | 8)
+
+
class TestOrder(unittest.TestCase):
"test usage of the `_order_` attribute"
diff --git a/Misc/NEWS.d/next/Library/2022-06-15-21-20-02.gh-issue-93820.FAMLY8.rst b/Misc/NEWS.d/next/Library/2022-06-15-21-20-02.gh-issue-93820.FAMLY8.rst
new file mode 100644
index 00000000000000..e06d897e7d8e6b
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2022-06-15-21-20-02.gh-issue-93820.FAMLY8.rst
@@ -0,0 +1,2 @@
+Fixed a regression when :func:`copy.copy`-ing :class:`enum.Flag` with
+multiple flag members.
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