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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)

Read more in the documentation.

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Credits

Author: Evgeniy Blinov

License

MIT License

Requires

Python >=3.8

Tags

cancellation tokens parallel programming concurrency context go context

Classifiers

Report project as malware

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