Svix - Webhooks as a service

Svix-KSUID (Python)

!API-Lint !Frontend-Lint !GitHub tag

This library is inspired by Segment's KSUID implementation:

For the Rust version, please check out

What is a ksuid?

A ksuid is a K sorted UID. In other words, a KSUID also stores a date component, so that ksuids can be approximately sorted based on the time they were created.

Read more here.

Usage

pip install svix-ksuid

from ksuid import Ksuid
ksuid = Ksuid()

Higher timestamp accuracy mode

Ksuids have a 1 second accuracy which is not sufficient for all use-cases. That's why this library exposes a higher accuracy mode which supports accuracy of up to 4ms.

It's fully compatible with normal ksuids, in fact, it outputs valid ksuids. The difference is that it sacrifices one byte of the random payload in favor of this accuracy.

The code too is fully compatible:

pip install svix-ksuid

from ksuid import KsuidMs
ksuid = KsuidMs()

Examples

Default ksuid

Generate a ksuid without passing a specific datetime

In [1]: from ksuid import Ksuid
In [2]: ksuid = Ksuid()
In [3]: f"Base62: {ksuid}"
Out[3]: 'Base62: 1srOrx2ZWZBpBUvZwXKQmoEYga2'
In [4]: f"Bytes: {bytes(ksuid)}"
Out[4]: "Bytes: b'\\r5\\xc43\\xe1\\x93>7\\xf2up\\x87c\\xad\\xc7tZ\\xf5\\xe7\\xf2'"
In [5]: f"Datetime: {ksuid.datetime}"
Out[5]: 'Datetime: 2021-05-21 14:04:03'
In [6]: f"Timestamp: {ksuid.timestamp}"
Out[6]: 'Timestamp: 1621627443'
In [7]: f"Payload: {ksuid.payload}"
Out[7]: "Payload: b'\\xe1\\x93>7\\xf2up\\x87c\\xad\\xc7tZ\\xf5\\xe7\\xf2'"

ksuid from datetime

In [1]: datetime = datetime(year=2021, month=5, day=19, hour=1, minute=1, second=1, microsecond=1)
In [2]: datetime
Out[2]: datetime.datetime(2021, 5, 19, 1, 1, 1, 1)
In [3]: ksuid = Ksuid(datetime)
In [4]: ksuid.datetime
Out[4]: datetime.datetime(2021, 5, 19, 1, 1, 1)
In [5]: ksuid.timestamp
Out[5]: 1621407661

ksuid from base62

In [1]: ksuid = Ksuid()
In [2]: ksuid.timestamp
Out[2]: 1621634852
In [3]: f"Base62: {ksuid}"
Out[3]: 'Base62: 1srdszO8Xy2cR6CnARnvxCfRmK4'
In [4]: ksuid_from_base62 = Ksuid.from_base62("1srdszO8Xy2cR6CnARnvxCfRmK4")
In [5]: ksuid_from_base62.timestamp
Out[5]: 1621634852

ksuid from bytes

In [1]: ksuid = Ksuid()
In [2]: ksuid_from_bytes = ksuid.from_bytes(bytes(ksuid))
In [3]: f"ksuid: {ksuid}, ksuid_from_bytes: {ksuid_from_bytes}"
Out[3]: 'ksuid: 1sreAHoz6myPhXghsOdVBoec3Vr, ksuid_from_bytes: 1sreAHoz6myPhXghsOdVBoec3Vr'
In [4]: ksuid == ksuid_from_bytes
Out[4]: True

Compare ksuid(s)

In [1]: ksuid_1 = Ksuid()
In [2]: ksuid_2 = Ksuid.from_bytes(bytes(ksuid_1))
In [3]: f"ksuid_1: {ksuid_1}, ksuid_2: {ksuid_2}"
Out[3]: 'ksuid_1: 1sreAHoz6myPhXghsOdVBoec3Vr, ksuid_2: 1sreAHoz6myPhXghsOdVBoec3Vr'
In [4]: ksuid_1 == ksuid_2
Out[4]: True
In [5]: ksuid_1
Out[5]: 1tM9eRSTrHIrrH5SMEW24rtvIOF
In [6]: ksuid_2
Out[6]: 1tM9eRSTrHIrrH5SMEW24rtvIOF

Order of ksuid(s)

In [1]: ksuid_1 = Ksuid()
In [2]: ksuid_1.timestamp
Out[2]: 1621963256
In [3]: ksuid_2 = Ksuid()
In [4]: ksuid_2.timestamp
Out[4]: 1621963266
In [5]: ksuid_1 < ksuid_2
Out[5]: True
In [6]: ksuid_1 <= ksuid_2
Out[6]: True
In [7]: ksuid_1 >= ksuid_2
Out[7]: False
In [8]: ksuid_1 > ksuid_2
Out[8]: False

License

ksuid source code is available under an MIT License.

Development

This application uses uv for virtualenv management by default.

- To lint, use uv run scripts/lint.sh - To run tests, use uv run pytest

This repository also has pre-commit hooks set up using prek. They will be checked in CI, but if you'd like to run them locally you can use the prek tool.