Unique id from random chars and optional date-time.
Project description
uqid:
pip install uqid from uqid import uqid, digits print(uqid()) # e7ljCIs4grYZ9tOv6bpX3TQIA7FyA23umzGjDcIjHff2XwF2ziAw56B7S3EdOuCA print(uqid(4, digits)) # 4982
Returns unique id from random chars.
Default is 64 chars 0-9a-zA-Z aka base62.
dtid:
pip install uqid from uqid import dtid print(dtid()) YYYYMMDDhhmmssmicrosrnd4 20161231235959123456uN1q
24 bytes by default - as str(ObjectId()).
But human-friendly - unlike ObjectId.
Microsecond-precise UTC timestamp - unlike second-precise ObjectId().
May extract datetime_from_dtid().
May be used as a log timestamp as is.
Alphabetically ordered.
Safe chars 0-9a-zA-Z - unlike binary ObjectId() leading to “ValueError: Invalid UTF-8 sequence length” if added to JSON without str().
base62^4 is over 14M uniques per microsecond.
dtid(24) is 2x faster than uqid(24) but slower than str(ObjectId())
tests:
python2 uqid.py python3 uqid.py SAMPLES: str(uuid4()): 3bb25137-2422-4d06-bd12-5a9de2ea2bf6 len(^): 36 len(v): 24 str(ObjectId()): 5acdcd1f9c591516ae800615 uqid(24): UFRFQVCtYu6rtQq8LD33XjI3 dtid(24): 20180411085351268116tHse Iterations: 1000000 python2 SECONDS: str(uuid4()) seconds: 11.825964 str(ObjectId()) seconds: 2.424702 uqid(24) seconds: 9.701306 dtid(24) seconds: 5.357983 python3 SECONDS: str(uuid4()) seconds: 5.826098 str(ObjectId()) seconds: 3.192565 uqid(24) seconds: 17.769653 dtid(24) seconds: 9.588677 DUPLICATES: str(uuid4()) duplicates: 0 str(ObjectId()) duplicates: 0 uqid(24) duplicates: 0 dtid(24) duplicates: 0
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