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Bug #1541863: uuid.uuid1 failed to generate unique identifiers

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on systems with low clock resolution.
This commit is contained in:
Martin v. Löwis 2006-08-18 03:40:13 +00:00
parent 552262409d
commit 2c3a256351
3 changed files with 9 additions and 3 deletions
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2
Lib/test/test_uuid.py
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@ -429,7 +429,7 @@ class TestUUID(TestCase):
# Make sure the generated UUIDs are actually unique. # Make sure the generated UUIDs are actually unique.
uuids = {} uuids = {}
for u in [uuid.uuid1() for i in range(1000)]: for u in [uuid.uuid4() for i in range(1000)]:
uuids[u] = 1 uuids[u] = 1
equal(len(uuids.keys()), 1000) equal(len(uuids.keys()), 1000)

4
Lib/uuid.py
View file

@ -488,8 +488,8 @@ def uuid1(node=None, clock_seq=None):
# 0x01b21dd213814000 is the number of 100-ns intervals between the # 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. # UUID epoch 1582-10-15 00:00:00 and the Unix epoch 1970-01-01 00:00:00.
timestamp = int(nanoseconds/100) + 0x01b21dd213814000L timestamp = int(nanoseconds/100) + 0x01b21dd213814000L
if timestamp == _last_timestamp: if timestamp <= _last_timestamp:
timestamp += 1 timestamp = _last_timestamp + 1
_last_timestamp = timestamp _last_timestamp = timestamp
if clock_seq is None: if clock_seq is None:
import random import random

6
Misc/NEWS
View file

@ -9,6 +9,12 @@ What's New in Python 2.5 ?
*Release date: XX-SEP-2006* *Release date: XX-SEP-2006*
Library
-------
- Bug #1541863: uuid.uuid1 failed to generate unique identifiers
on systems with low clock resolution.
Build Build
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