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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 2x slower than str(ObjectId()).

tests:

python uqid.py

Length: 24
uqid(24): SdGksfuUJAmDGz7suDzgJYr4
dtid(24): 20160923092803852711Pqci
str(ObjectId()): 57e4f5a39c5915591b593563
Iterations: 1000000
uqid(24) seconds: 11.457604
dtid(24) seconds: 5.997643
str(ObjectId()) seconds: 2.715093
uqid(24) duplicates: 0
dtid(24) duplicates: 0
str(ObjectId()) duplicates: 0

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