python
diff --git a/‎Lib/test/test_uuid.py
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+5Lines changed: 5 additions & 0 deletions b/‎Lib/test/test_uuid.py
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diff --git a/‎Lib/uuid.py
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-1Lines changed: 0 additions & 1 deletion b/‎Lib/uuid.py
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diff --git a/‎Misc/NEWS.d/next/Library/2017-09-28-16-21-13.bpo-29729.skDkJA.rst
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@@ -456,6 +456,11 @@ def testIssue8621(self):
 
             self.assertNotEqual(parent_value, child_value)
 
+    def test_bytes_like(self):
+        u = uuid.uuid4()
+        self.assertEqual(uuid.UUID(bytes=memoryview(u.bytes)), u)
+        self.assertEqual(uuid.UUID(bytes=bytearray(u.bytes)), u)
+
 
 class TestInternals(unittest.TestCase):
     @unittest.skipUnless(os.name == 'posix', 'requires Posix')
 
@@ -166,7 +166,6 @@ def __init__(self, hex=None, bytes=None, bytes_le=None, fields=None,
         if bytes is not None:
             if len(bytes) != 16:
                 raise ValueError('bytes is not a 16-char string')
-            assert isinstance(bytes, bytes_), repr(bytes)
             int = int_.from_bytes(bytes, byteorder='big')
         if fields is not None:
             if len(fields) != 6:
 
@@ -0,0 +1,3 @@
+uuid.UUID now accepts bytes-like object. The constructor doesn't require the
+'bytes' argument to be an instance of bytes: accept bytes-like types,
+bytearray and memoryview for example.