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Random prefixed ids

Project description

zuid

Generates URL-safe random ids with a prefix and optional timestamp.

Installing

pip install zuid

Usage

The ZUID class works as a callable id factory for a given prefix:

>>> from zuid import ZUID
>>> generator = ZUID(prefix='user_')
>>> generator()
'user_03QewpfEIpPWUICXdgtvdR'
>>> generator()
'user_1LJSXMoyH6p7VsiL8wwIm1'

The factory generates ids that are 22 chars long by default, which in base 62 corresponds to 131 random bits. For comparison, a v4 UUID has 122 random bits. It can be changed with the length parameter:

>>> generator = ZUID(prefix='user_', length=27)
>>> generator()
'user_X5fSIStIKpYWcg07nqEfPbMvmME'

With the timestamped parameter, the factory uses the current nanoseconds since epoch as the first 8 bytes, preserving the order when sorting by id.

>>> generator = ZUID(prefix='user_', timestamped=True)
>>> generator()
'user_1qzuvBwgHdQVO2gA4GelYX'
>>> generator()
'user_1qzuvCscVyClzGaqakgvsl'
>>> generator()
'user_1qzuvDb0TuCuIJJON103Of'
>>> generator()
'user_1qzuvES4mTQ7fWykywvjNb

Project details


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