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Implementation of the "Cancellation Token" pattern

// repository documentation

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</details>

![logo](https://raw.githubusercontent.com/pomponchik/cantok/main/docs/assets/logo_5.png)

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#](https://learn.microsoft.com/en-us/dotnet/api/system.threading.cancellationtoken) and in [Go](https://pkg.go.dev/context). However, there was still no sane implementation in Python, until the [cantok](https://github.com/pomponchik/cantok) library appeared.

## Quick start

Install [it](https://pypi.org/project/cantok/):

```bash
pip install cantok
```

And use:

```python
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](https://cantok.readthedocs.io/en/latest/).

cantok

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