cantok

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Cancellation Token is a pattern that allows us to cancel calculations that we no longer need. It is implemented out of the box in many programming languages, for example in C# and in Go. However, there was still no sane implementation in Python, until the cantok library appeared.

Quick start

Install it:

pip install cantok

And use:

from random import randint
from cantok import ConditionToken, CounterToken, TimeoutToken

token = ConditionToken(lambda: randint(1, 100_000) == 1984) + CounterToken(400_000, direct=False) + TimeoutToken(1)
counter = 0

while token:
  counter += 1

print(counter)

Metadata

Release files for cantok 0.0.43

For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.

Source distribution (sdist)

Source distribution for cantok 0.0.43
File	Size	Uploaded
cantok-0.0.43.tar.gz	11.4 kB	Jul 20, 2026	Details

Built distribution (wheel)

Table of built distributions (wheels) for cantok 0.0.43
File	Interpreter	ABI	Platform	Reset
cantok-0.0.43-py3-none-any.whl 13.4 kB Jul 20, 2026	Python 3	none	any	Details

Total release size: 24.8 kB

Release files / cantok-0.0.43.tar.gz

Download URL	cantok-0.0.43.tar.gz
Size	11.4 kB
Tags	Source
SHA-256 checksum How to use checksums	`e40e16b4bfcbd5dcbdc036cac16ff64bb753a89b378837ec8a8b7ca90bc953d9`
BLAKE2b-256 checksum How to use checksums	`ac67d7ca148e312ca5b624d3caf7185a8f7760a694e1c9597b2850f5dd635392`
Upload date	Jul 20, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/6.1.0 CPython/3.13.14`

Provenance

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Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/mutating/cantok
Publishing commit: github.com/mutating/cantok/tree/d116cd9d1380e348588a0da010d8b917c727bde3

Workflow

Publishing configuration: github.com/mutating/cantok/blob/d116cd9d1380e348588a0da010d8b917c727bde3/.github/workflows/release.yml
Publishing logs: github.com/mutating/cantok/actions/runs/29784506202/attempts/1

Artifact

Subject: cantok-0.0.43.tar.gz
SHA-256 checksum: e40e16b4bfcbd5dcbdc036cac16ff64bb753a89b378837ec8a8b7ca90bc953d9 Verifying attestations

Release files / cantok-0.0.43-py3-none-any.whl

Download URL	cantok-0.0.43-py3-none-any.whl
Size	13.4 kB
Tags	Python 3
SHA-256 checksum How to use checksums	`8f5288fce95acc1c359264fbde27146e91f08c599bf700884b7c4f35c9328c28`
BLAKE2b-256 checksum How to use checksums	`57ceb7287569531994f3e1513b72c583dbd4db97bcec63c63183c8d3393049c9`
Upload date	Jul 20, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/6.1.0 CPython/3.13.14`

Provenance

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/mutating/cantok
Publishing commit: github.com/mutating/cantok/tree/d116cd9d1380e348588a0da010d8b917c727bde3

Workflow

Publishing configuration: github.com/mutating/cantok/blob/d116cd9d1380e348588a0da010d8b917c727bde3/.github/workflows/release.yml
Publishing logs: github.com/mutating/cantok/actions/runs/29784506202/attempts/1

Artifact

Subject: cantok-0.0.43-py3-none-any.whl
SHA-256 checksum: 8f5288fce95acc1c359264fbde27146e91f08c599bf700884b7c4f35c9328c28 Verifying attestations