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What is this?

This is a port of the original JavaScript ULID implementation to Python.

A ULID is a universally unique lexicographically sortable identifier. It is

  • 128-bit compatible with UUID

  • 1.21e+24 unique ULIDs per millisecond

  • Lexicographically sortable!

  • Canonically encoded as a 26 character string, as opposed to the 36 character UUID

  • Uses Crockford’s base32 for better efficiency and readability (5 bits per character)

  • Case insensitive

  • No special characters (URL safe)

In general the structure of a ULID is as follows:

01AN4Z07BY      79KA1307SR9X4MV3
|----------|    |----------------|
 Timestamp          Randomness
   48bits             80bits

For more information have a look at the original specification.

Basic Usage

>>> from ulid import ULID
>>> ulid = ULID.new()
>>> ulid.str
'01BTGNYV6HRNK8K8VKZASZCFPE'
>>> ulid.timestamp
1505945939.153
>>> ulid.datetime
datetime.datetime(2017, 9, 20, 22, 18, 59, 153000)

Installation

$ pip install python-ulid

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