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34 lines
1.1 KiB
Markdown
34 lines
1.1 KiB
Markdown
# `permchain`
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## Get started
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`pip install permchain`
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## Usage
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```python
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from permchain import InMemoryPubSubConnection, PubSub, Topic
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topic_one = Topic("one")
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chain_one = Topic.IN.subscribe() | (lambda x: x + 'b') | topic_one.publish()
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chain_two = topic_one.subscribe() | (lambda x: x + 'c') | Topic.OUT.publish()
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conn = InMemoryPubSubConnection()
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pubsub = PubSub(processes=(chain_one, chain_two), connection=conn)
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assert pubsub.invoke('a') == ['abc']
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```
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Check `tests` and `examples` for more examples.
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## Roadmap
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- [ ] Add initial retry support (pending changes in `langchain`)
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- [ ] Detect cycles (aka. infinite loops) and throw an error
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- [ ] Allow user to catch that error (by subcribing to an error topic?)
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- [ ] Replace Queue data structure with a Log data structure (this will enable checking the status of the readers, etc.)
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- [ ] eg. https://anyio.readthedocs.io/en/3.x/streams.html
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- [ ] Implement IN and OUT topics as regular topics
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- [ ] Enable resuming PubSub from the "middle" of the computation
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- [ ] Add Redis-backed Connection implementation
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