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bpo-29729: uuid.UUID now accepts bytes-like object #3801

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bpo-29729: uuid.UUID now accepts bytes-like object #3801

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9038f43
bpo-29729: uuid.UUID now accepts bytes-like object
vstinner Sep 28, 2017
c35cb1d
Accept also bytes-like for bytes_le
vstinner Sep 28, 2017
58d013c
Update the NEWS entry.
vstinner Sep 28, 2017
d7262ad
Merge branch 'master' into uuid_bytes
vstinner Sep 28, 2017
a169e89
Fix UUID(bytes_le=16)
vstinner Sep 28, 2017
583c9fc
Remove a comment
vstinner Oct 2, 2017
f437da5
Merge branch 'master' into uuid_bytes
vstinner Oct 3, 2017
bf919ce
Repeat that objects must have a length of 16
vstinner Oct 3, 2017
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5 changes: 5 additions & 0 deletions Lib/test/test_uuid.py
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Original file line number Diff line number Diff line change
Expand Up @@ -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')
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1 change: 0 additions & 1 deletion Lib/uuid.py
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Expand Up @@ -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:
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>>> a = array.array('i', [-1]*4)
>>> x = int.from_bytes(a, byteorder='big')
>>> len(a)
4
>>> x.bit_length()/8
16.0

And conversely:

>>> a = array.array('i', [-1]*16)
>>> x = int.from_bytes(a, byteorder='big')
>>> len(a)
16
>>> x.bit_length()/8
64.0

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:
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3 changes: 3 additions & 0 deletions Misc/NEWS.d/next/Library/2017-09-28-16-21-13.bpo-29729.skDkJA.rst
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@@ -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,
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... and 'bytes_le'

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Oops, fixed.

bytearray and memoryview for example.