uqid 0.2.0

Unique id from random chars and optional date-time.

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