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Update code and tests to support the 'bytes_le' attribute (for
little-endian byte order on Windows), and to work around clocks with low resolution yielding duplicate UUIDs. Anthony Baxter has approved this change.
This commit is contained in:
Ka-Ping Yee
parent
d112bc7958
commit
b1cb56ad17
2 changed files with 103 additions and 52 deletions
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@ -16,12 +16,13 @@ class TestUUID(TestCase):
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def test_UUID(self):
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equal = self.assertEqual
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ascending = []
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for (string, curly, hex, bytes, fields, integer, urn,
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for (string, curly, hex, bytes, bytes_le, fields, integer, urn,
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time, clock_seq, variant, version) in [
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('00000000-0000-0000-0000-000000000000',
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'{00000000-0000-0000-0000-000000000000}',
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'00000000000000000000000000000000',
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'\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0',
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'\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0',
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(0, 0, 0, 0, 0, 0),
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0,
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'urn:uuid:00000000-0000-0000-0000-000000000000',
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@ -30,6 +31,7 @@ class TestUUID(TestCase):
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'{00010203-0405-0607-0809-0a0b0c0d0e0f}',
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'000102030405060708090a0b0c0d0e0f',
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'\0\x01\x02\x03\x04\x05\x06\x07\x08\t\n\x0b\x0c\x0d\x0e\x0f',
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'\x03\x02\x01\0\x05\x04\x07\x06\x08\t\n\x0b\x0c\x0d\x0e\x0f',
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(0x00010203L, 0x0405, 0x0607, 8, 9, 0x0a0b0c0d0e0fL),
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0x000102030405060708090a0b0c0d0e0fL,
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'urn:uuid:00010203-0405-0607-0809-0a0b0c0d0e0f',
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@ -38,6 +40,7 @@ class TestUUID(TestCase):
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'{02d9e6d5-9467-382e-8f9b-9300a64ac3cd}',
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'02d9e6d59467382e8f9b9300a64ac3cd',
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'\x02\xd9\xe6\xd5\x94\x67\x38\x2e\x8f\x9b\x93\x00\xa6\x4a\xc3\xcd',
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'\xd5\xe6\xd9\x02\x67\x94\x2e\x38\x8f\x9b\x93\x00\xa6\x4a\xc3\xcd',
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(0x02d9e6d5L, 0x9467, 0x382e, 0x8f, 0x9b, 0x9300a64ac3cdL),
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0x02d9e6d59467382e8f9b9300a64ac3cdL,
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'urn:uuid:02d9e6d5-9467-382e-8f9b-9300a64ac3cd',
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@ -46,6 +49,7 @@ class TestUUID(TestCase):
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'{12345678-1234-5678-1234-567812345678}',
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'12345678123456781234567812345678',
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'\x12\x34\x56\x78'*4,
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'\x78\x56\x34\x12\x34\x12\x78\x56\x12\x34\x56\x78\x12\x34\x56\x78',
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(0x12345678, 0x1234, 0x5678, 0x12, 0x34, 0x567812345678),
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0x12345678123456781234567812345678,
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'urn:uuid:12345678-1234-5678-1234-567812345678',
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@ -54,6 +58,7 @@ class TestUUID(TestCase):
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'{6ba7b810-9dad-11d1-80b4-00c04fd430c8}',
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'6ba7b8109dad11d180b400c04fd430c8',
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'\x6b\xa7\xb8\x10\x9d\xad\x11\xd1\x80\xb4\x00\xc0\x4f\xd4\x30\xc8',
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'\x10\xb8\xa7\x6b\xad\x9d\xd1\x11\x80\xb4\x00\xc0\x4f\xd4\x30\xc8',
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(0x6ba7b810L, 0x9dad, 0x11d1, 0x80, 0xb4, 0x00c04fd430c8L),
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0x6ba7b8109dad11d180b400c04fd430c8L,
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'urn:uuid:6ba7b810-9dad-11d1-80b4-00c04fd430c8',
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@ -62,6 +67,7 @@ class TestUUID(TestCase):
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'{6ba7b811-9dad-11d1-80b4-00c04fd430c8}',
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'6ba7b8119dad11d180b400c04fd430c8',
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'\x6b\xa7\xb8\x11\x9d\xad\x11\xd1\x80\xb4\x00\xc0\x4f\xd4\x30\xc8',
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'\x11\xb8\xa7\x6b\xad\x9d\xd1\x11\x80\xb4\x00\xc0\x4f\xd4\x30\xc8',
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(0x6ba7b811L, 0x9dad, 0x11d1, 0x80, 0xb4, 0x00c04fd430c8L),
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0x6ba7b8119dad11d180b400c04fd430c8L,
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'urn:uuid:6ba7b811-9dad-11d1-80b4-00c04fd430c8',
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@ -70,6 +76,7 @@ class TestUUID(TestCase):
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'{6ba7b812-9dad-11d1-80b4-00c04fd430c8}',
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'6ba7b8129dad11d180b400c04fd430c8',
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'\x6b\xa7\xb8\x12\x9d\xad\x11\xd1\x80\xb4\x00\xc0\x4f\xd4\x30\xc8',
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'\x12\xb8\xa7\x6b\xad\x9d\xd1\x11\x80\xb4\x00\xc0\x4f\xd4\x30\xc8',
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(0x6ba7b812L, 0x9dad, 0x11d1, 0x80, 0xb4, 0x00c04fd430c8L),
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0x6ba7b8129dad11d180b400c04fd430c8L,
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'urn:uuid:6ba7b812-9dad-11d1-80b4-00c04fd430c8',
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@ -78,6 +85,7 @@ class TestUUID(TestCase):
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'{6ba7b814-9dad-11d1-80b4-00c04fd430c8}',
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'6ba7b8149dad11d180b400c04fd430c8',
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'\x6b\xa7\xb8\x14\x9d\xad\x11\xd1\x80\xb4\x00\xc0\x4f\xd4\x30\xc8',
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'\x14\xb8\xa7\x6b\xad\x9d\xd1\x11\x80\xb4\x00\xc0\x4f\xd4\x30\xc8',
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(0x6ba7b814L, 0x9dad, 0x11d1, 0x80, 0xb4, 0x00c04fd430c8L),
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0x6ba7b8149dad11d180b400c04fd430c8L,
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'urn:uuid:6ba7b814-9dad-11d1-80b4-00c04fd430c8',
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@ -86,6 +94,7 @@ class TestUUID(TestCase):
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'{7d444840-9dc0-11d1-b245-5ffdce74fad2}',
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'7d4448409dc011d1b2455ffdce74fad2',
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'\x7d\x44\x48\x40\x9d\xc0\x11\xd1\xb2\x45\x5f\xfd\xce\x74\xfa\xd2',
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'\x40\x48\x44\x7d\xc0\x9d\xd1\x11\xb2\x45\x5f\xfd\xce\x74\xfa\xd2',
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(0x7d444840L, 0x9dc0, 0x11d1, 0xb2, 0x45, 0x5ffdce74fad2L),
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0x7d4448409dc011d1b2455ffdce74fad2L,
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'urn:uuid:7d444840-9dc0-11d1-b245-5ffdce74fad2',
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@ -94,6 +103,7 @@ class TestUUID(TestCase):
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'{e902893a-9d22-3c7e-a7b8-d6e313b71d9f}',
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'e902893a9d223c7ea7b8d6e313b71d9f',
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'\xe9\x02\x89\x3a\x9d\x22\x3c\x7e\xa7\xb8\xd6\xe3\x13\xb7\x1d\x9f',
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'\x3a\x89\x02\xe9\x22\x9d\x7e\x3c\xa7\xb8\xd6\xe3\x13\xb7\x1d\x9f',
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(0xe902893aL, 0x9d22, 0x3c7e, 0xa7, 0xb8, 0xd6e313b71d9fL),
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0xe902893a9d223c7ea7b8d6e313b71d9fL,
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'urn:uuid:e902893a-9d22-3c7e-a7b8-d6e313b71d9f',
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@ -102,6 +112,7 @@ class TestUUID(TestCase):
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'{eb424026-6f54-4ef8-a4d0-bb658a1fc6cf}',
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'eb4240266f544ef8a4d0bb658a1fc6cf',
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'\xeb\x42\x40\x26\x6f\x54\x4e\xf8\xa4\xd0\xbb\x65\x8a\x1f\xc6\xcf',
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'\x26\x40\x42\xeb\x54\x6f\xf8\x4e\xa4\xd0\xbb\x65\x8a\x1f\xc6\xcf',
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(0xeb424026L, 0x6f54, 0x4ef8, 0xa4, 0xd0, 0xbb658a1fc6cfL),
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0xeb4240266f544ef8a4d0bb658a1fc6cfL,
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'urn:uuid:eb424026-6f54-4ef8-a4d0-bb658a1fc6cf',
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@ -110,6 +121,7 @@ class TestUUID(TestCase):
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'{f81d4fae-7dec-11d0-a765-00a0c91e6bf6}',
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'f81d4fae7dec11d0a76500a0c91e6bf6',
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'\xf8\x1d\x4f\xae\x7d\xec\x11\xd0\xa7\x65\x00\xa0\xc9\x1e\x6b\xf6',
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'\xae\x4f\x1d\xf8\xec\x7d\xd0\x11\xa7\x65\x00\xa0\xc9\x1e\x6b\xf6',
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(0xf81d4faeL, 0x7dec, 0x11d0, 0xa7, 0x65, 0x00a0c91e6bf6L),
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0xf81d4fae7dec11d0a76500a0c91e6bf6L,
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'urn:uuid:f81d4fae-7dec-11d0-a765-00a0c91e6bf6',
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@ -118,6 +130,7 @@ class TestUUID(TestCase):
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'{fffefdfc-fffe-fffe-fffe-fffefdfcfbfa}',
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'fffefdfcfffefffefffefffefdfcfbfa',
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'\xff\xfe\xfd\xfc\xff\xfe\xff\xfe\xff\xfe\xff\xfe\xfd\xfc\xfb\xfa',
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'\xfc\xfd\xfe\xff\xfe\xff\xfe\xff\xff\xfe\xff\xfe\xfd\xfc\xfb\xfa',
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(0xfffefdfcL, 0xfffe, 0xfffe, 0xff, 0xfe, 0xfffefdfcfbfaL),
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0xfffefdfcfffefffefffefffefdfcfbfaL,
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'urn:uuid:fffefdfc-fffe-fffe-fffe-fffefdfcfbfa',
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@ -126,6 +139,7 @@ class TestUUID(TestCase):
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'{ffffffff-ffff-ffff-ffff-ffffffffffff}',
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'ffffffffffffffffffffffffffffffff',
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'\xff'*16,
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'\xff'*16,
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(0xffffffffL, 0xffffL, 0xffffL, 0xff, 0xff, 0xffffffffffffL),
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0xffffffffffffffffffffffffffffffffL,
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'urn:uuid:ffffffff-ffff-ffff-ffff-ffffffffffff',
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@ -134,12 +148,14 @@ class TestUUID(TestCase):
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equivalents = []
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# Construct each UUID in several different ways.
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for u in [uuid.UUID(string), uuid.UUID(curly), uuid.UUID(hex),
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uuid.UUID(bytes=bytes), uuid.UUID(fields=fields),
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uuid.UUID(int=integer), uuid.UUID(urn)]:
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uuid.UUID(bytes=bytes), uuid.UUID(bytes_le=bytes_le),
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uuid.UUID(fields=fields), uuid.UUID(int=integer),
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uuid.UUID(urn)]:
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# Test all conversions and properties of the UUID object.
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equal(str(u), string)
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equal(int(u), integer)
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equal(u.bytes, bytes)
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equal(u.bytes_le, bytes_le)
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equal(u.fields, fields)
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equal(u.time_low, fields[0])
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equal(u.time_mid, fields[1])
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@ -189,6 +205,11 @@ class TestUUID(TestCase):
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badvalue(lambda: uuid.UUID(bytes='\0'*15))
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badvalue(lambda: uuid.UUID(bytes='\0'*17))
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# Badly formed bytes_le.
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badvalue(lambda: uuid.UUID(bytes_le='abc'))
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badvalue(lambda: uuid.UUID(bytes_le='\0'*15))
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badvalue(lambda: uuid.UUID(bytes_le='\0'*17))
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# Badly formed fields.
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badvalue(lambda: uuid.UUID(fields=(1,)))
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badvalue(lambda: uuid.UUID(fields=(1, 2, 3, 4, 5)))
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@ -221,51 +242,43 @@ class TestUUID(TestCase):
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uuid.UUID(h)
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uuid.UUID(hex=h)
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uuid.UUID(bytes=b)
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uuid.UUID(bytes_le=b)
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uuid.UUID(fields=f)
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uuid.UUID(int=i)
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# Wrong number of arguments (positional).
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badtype(lambda: uuid.UUID())
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badtype(lambda: uuid.UUID(h, b))
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badtype(lambda: uuid.UUID(h, b, f))
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badtype(lambda: uuid.UUID(h, b, f, i))
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badtype(lambda: uuid.UUID(h, b, b))
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badtype(lambda: uuid.UUID(h, b, b, f))
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badtype(lambda: uuid.UUID(h, b, b, f, i))
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# Duplicate arguments (named).
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badtype(lambda: uuid.UUID(hex=h, bytes=b))
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badtype(lambda: uuid.UUID(hex=h, fields=f))
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badtype(lambda: uuid.UUID(hex=h, int=i))
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badtype(lambda: uuid.UUID(bytes=b, fields=f))
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badtype(lambda: uuid.UUID(bytes=b, int=i))
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badtype(lambda: uuid.UUID(fields=f, int=i))
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badtype(lambda: uuid.UUID(hex=h, bytes=b, fields=f))
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badtype(lambda: uuid.UUID(hex=h, bytes=b, int=i))
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badtype(lambda: uuid.UUID(hex=h, fields=f, int=i))
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badtype(lambda: uuid.UUID(bytes=b, int=i, fields=f))
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badtype(lambda: uuid.UUID(hex=h, bytes=b, int=i, fields=f))
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# Duplicate arguments (positional and named).
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badtype(lambda: uuid.UUID(h, hex=h))
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badtype(lambda: uuid.UUID(h, bytes=b))
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badtype(lambda: uuid.UUID(h, fields=f))
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badtype(lambda: uuid.UUID(h, int=i))
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badtype(lambda: uuid.UUID(h, hex=h, bytes=b))
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badtype(lambda: uuid.UUID(h, hex=h, fields=f))
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badtype(lambda: uuid.UUID(h, hex=h, int=i))
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badtype(lambda: uuid.UUID(h, bytes=b, fields=f))
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badtype(lambda: uuid.UUID(h, bytes=b, int=i))
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badtype(lambda: uuid.UUID(h, fields=f, int=i))
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badtype(lambda: uuid.UUID(h, hex=h, bytes=b, fields=f))
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badtype(lambda: uuid.UUID(h, hex=h, bytes=b, int=i))
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badtype(lambda: uuid.UUID(h, hex=h, fields=f, int=i))
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badtype(lambda: uuid.UUID(h, bytes=b, int=i, fields=f))
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badtype(lambda: uuid.UUID(h, hex=h, bytes=b, int=i, fields=f))
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# Duplicate arguments.
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for hh in [[], [('hex', h)]]:
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for bb in [[], [('bytes', b)]]:
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for bble in [[], [('bytes_le', b)]]:
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for ii in [[], [('int', i)]]:
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for ff in [[], [('fields', f)]]:
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args = dict(hh + bb + bble + ii + ff)
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if len(args) != 0:
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badtype(lambda: uuid.UUID(h, **args))
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if len(args) != 1:
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badtype(lambda: uuid.UUID(**args))
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# Immutability.
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u = uuid.UUID(h)
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badtype(lambda: setattr(u, 'hex', h))
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badtype(lambda: setattr(u, 'bytes', b))
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badtype(lambda: setattr(u, 'bytes_le', b))
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badtype(lambda: setattr(u, 'fields', f))
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badtype(lambda: setattr(u, 'int', i))
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badtype(lambda: setattr(u, 'time_low', 0))
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badtype(lambda: setattr(u, 'time_mid', 0))
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badtype(lambda: setattr(u, 'time_hi_version', 0))
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badtype(lambda: setattr(u, 'time_hi_version', 0))
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badtype(lambda: setattr(u, 'clock_seq_hi_variant', 0))
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badtype(lambda: setattr(u, 'clock_seq_low', 0))
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badtype(lambda: setattr(u, 'node', 0))
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def check_node(self, node, source):
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individual_group_bit = (node >> 40L) & 1
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@ -356,11 +369,17 @@ class TestUUID(TestCase):
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def test_uuid1(self):
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equal = self.assertEqual
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# Make sure uuid4() generates UUIDs that are actually version 1.
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# Make sure uuid1() generates UUIDs that are actually version 1.
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for u in [uuid.uuid1() for i in range(10)]:
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equal(u.variant, uuid.RFC_4122)
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equal(u.version, 1)
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# Make sure the generated UUIDs are actually unique.
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uuids = {}
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for u in [uuid.uuid1() for i in range(1000)]:
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uuids[u] = 1
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equal(len(uuids.keys()), 1000)
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# Make sure the supplied node ID appears in the UUID.
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u = uuid.uuid1(0)
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equal(u.node, 0)
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@ -408,6 +427,12 @@ class TestUUID(TestCase):
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equal(u.variant, uuid.RFC_4122)
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equal(u.version, 4)
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# Make sure the generated UUIDs are actually unique.
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uuids = {}
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for u in [uuid.uuid1() for i in range(1000)]:
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uuids[u] = 1
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equal(len(uuids.keys()), 1000)
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def test_uuid5(self):
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equal = self.assertEqual
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60
Lib/uuid.py
60
Lib/uuid.py
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@ -45,8 +45,6 @@ Typical usage:
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"""
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__author__ = 'Ka-Ping Yee <ping@zesty.ca>'
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__date__ = '$Date: 2006/06/12 23:15:40 $'.split()[1].replace('/', '-')
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__version__ = '$Revision: 1.30 $'.split()[1]
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RESERVED_NCS, RFC_4122, RESERVED_MICROSOFT, RESERVED_FUTURE = [
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'reserved for NCS compatibility', 'specified in RFC 4122',
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@ -57,15 +55,21 @@ class UUID(object):
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UUID objects are immutable, hashable, and usable as dictionary keys.
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Converting a UUID to a string with str() yields something in the form
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'12345678-1234-1234-1234-123456789abc'. The UUID constructor accepts
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four possible forms: a similar string of hexadecimal digits, or a
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string of 16 raw bytes as an argument named 'bytes', or a tuple of
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six integer fields (with 32-bit, 16-bit, 16-bit, 8-bit, 8-bit, and
|
||||
48-bit values respectively) as an argument named 'fields', or a single
|
||||
128-bit integer as an argument named 'int'.
|
||||
five possible forms: a similar string of hexadecimal digits, or a tuple
|
||||
of six integer fields (with 32-bit, 16-bit, 16-bit, 8-bit, 8-bit, and
|
||||
48-bit values respectively) as an argument named 'fields', or a string
|
||||
of 16 bytes (with all the integer fields in big-endian order) as an
|
||||
argument named 'bytes', or a string of 16 bytes (with the first three
|
||||
fields in little-endian order) as an argument named 'bytes_le', or a
|
||||
single 128-bit integer as an argument named 'int'.
|
||||
|
||||
UUIDs have these read-only attributes:
|
||||
|
||||
bytes the UUID as a 16-byte string
|
||||
bytes the UUID as a 16-byte string (containing the six
|
||||
integer fields in big-endian byte order)
|
||||
|
||||
bytes_le the UUID as a 16-byte string (with time_low, time_mid,
|
||||
and time_hi_version in little-endian byte order)
|
||||
|
||||
fields a tuple of the six integer fields of the UUID,
|
||||
which are also available as six individual attributes
|
||||
|
|
@ -94,10 +98,11 @@ class UUID(object):
|
|||
when the variant is RFC_4122)
|
||||
"""
|
||||
|
||||
def __init__(self, hex=None, bytes=None, fields=None, int=None,
|
||||
version=None):
|
||||
def __init__(self, hex=None, bytes=None, bytes_le=None, fields=None,
|
||||
int=None, version=None):
|
||||
r"""Create a UUID from either a string of 32 hexadecimal digits,
|
||||
a string of 16 bytes as the 'bytes' argument, a tuple of six
|
||||
a string of 16 bytes as the 'bytes' argument, a string of 16 bytes
|
||||
in little-endian order as the 'bytes_le' argument, a tuple of six
|
||||
integers (32-bit time_low, 16-bit time_mid, 16-bit time_hi_version,
|
||||
8-bit clock_seq_hi_variant, 8-bit clock_seq_low, 48-bit node) as
|
||||
the 'fields' argument, or a single 128-bit integer as the 'int'
|
||||
|
|
@ -109,23 +114,31 @@ class UUID(object):
|
|||
UUID('12345678123456781234567812345678')
|
||||
UUID('urn:uuid:12345678-1234-5678-1234-567812345678')
|
||||
UUID(bytes='\x12\x34\x56\x78'*4)
|
||||
UUID(bytes_le='\x78\x56\x34\x12\x34\x12\x78\x56' +
|
||||
'\x12\x34\x56\x78\x12\x34\x56\x78')
|
||||
UUID(fields=(0x12345678, 0x1234, 0x5678, 0x12, 0x34, 0x567812345678))
|
||||
UUID(int=0x12345678123456781234567812345678)
|
||||
|
||||
Exactly one of 'hex', 'bytes', 'fields', or 'int' must be given.
|
||||
The 'version' argument is optional; if given, the resulting UUID
|
||||
will have its variant and version number set according to RFC 4122,
|
||||
overriding bits in the given 'hex', 'bytes', 'fields', or 'int'.
|
||||
Exactly one of 'hex', 'bytes', 'bytes_le', 'fields', or 'int' must
|
||||
be given. The 'version' argument is optional; if given, the resulting
|
||||
UUID will have its variant and version set according to RFC 4122,
|
||||
overriding the given 'hex', 'bytes', 'bytes_le', 'fields', or 'int'.
|
||||
"""
|
||||
|
||||
if [hex, bytes, fields, int].count(None) != 3:
|
||||
raise TypeError('need just one of hex, bytes, fields, or int')
|
||||
if [hex, bytes, bytes_le, fields, int].count(None) != 4:
|
||||
raise TypeError('need one of hex, bytes, bytes_le, fields, or int')
|
||||
if hex is not None:
|
||||
hex = hex.replace('urn:', '').replace('uuid:', '')
|
||||
hex = hex.strip('{}').replace('-', '')
|
||||
if len(hex) != 32:
|
||||
raise ValueError('badly formed hexadecimal UUID string')
|
||||
int = long(hex, 16)
|
||||
if bytes_le is not None:
|
||||
if len(bytes_le) != 16:
|
||||
raise ValueError('bytes_le is not a 16-char string')
|
||||
bytes = (bytes_le[3] + bytes_le[2] + bytes_le[1] + bytes_le[0] +
|
||||
bytes_le[5] + bytes_le[4] + bytes_le[7] + bytes_le[6] +
|
||||
bytes_le[8:])
|
||||
if bytes is not None:
|
||||
if len(bytes) != 16:
|
||||
raise ValueError('bytes is not a 16-char string')
|
||||
|
|
@ -194,6 +207,13 @@ class UUID(object):
|
|||
|
||||
bytes = property(get_bytes)
|
||||
|
||||
def get_bytes_le(self):
|
||||
bytes = self.bytes
|
||||
return (bytes[3] + bytes[2] + bytes[1] + bytes[0] +
|
||||
bytes[5] + bytes[4] + bytes[7] + bytes[6] + bytes[8:])
|
||||
|
||||
bytes_le = property(get_bytes_le)
|
||||
|
||||
def get_fields(self):
|
||||
return (self.time_low, self.time_mid, self.time_hi_version,
|
||||
self.clock_seq_hi_variant, self.clock_seq_low, self.node)
|
||||
|
|
@ -448,6 +468,8 @@ def getnode():
|
|||
if _node is not None:
|
||||
return _node
|
||||
|
||||
_last_timestamp = None
|
||||
|
||||
def uuid1(node=None, clock_seq=None):
|
||||
"""Generate a UUID from a host ID, sequence number, and the current time.
|
||||
If 'node' is not given, getnode() is used to obtain the hardware
|
||||
|
|
@ -460,11 +482,15 @@ def uuid1(node=None, clock_seq=None):
|
|||
_uuid_generate_time(_buffer)
|
||||
return UUID(bytes=_buffer.raw)
|
||||
|
||||
global _last_timestamp
|
||||
import time
|
||||
nanoseconds = int(time.time() * 1e9)
|
||||
# 0x01b21dd213814000 is the number of 100-ns intervals between the
|
||||
# UUID epoch 1582-10-15 00:00:00 and the Unix epoch 1970-01-01 00:00:00.
|
||||
timestamp = int(nanoseconds/100) + 0x01b21dd213814000L
|
||||
if timestamp == _last_timestamp:
|
||||
timestamp += 1
|
||||
_last_timestamp = timestamp
|
||||
if clock_seq is None:
|
||||
import random
|
||||
clock_seq = random.randrange(1<<14L) # instead of stable storage
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue