Further tweaks, add non-scary snippet
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@ -8,28 +8,35 @@ The Python async-native multi-core system *you always wanted*.
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.. _actor model: https://en.wikipedia.org/wiki/Actor_model
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.. _actor model: https://en.wikipedia.org/wiki/Actor_model
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.. _trio: https://github.com/python-trio/trio
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.. _trio: https://github.com/python-trio/trio
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.. _multiprocessing: https://en.wikipedia.org/wiki/Multiprocessing
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.. _multi-processing: https://en.wikipedia.org/wiki/Multiprocessing
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.. _trionic: https://trio.readthedocs.io/en/latest/design.html#high-level-design-principles
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.. _trionic: https://trio.readthedocs.io/en/latest/design.html#high-level-design-principles
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.. _async sandwich: https://trio.readthedocs.io/en/latest/tutorial.html#async-sandwich
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.. _async sandwich: https://trio.readthedocs.io/en/latest/tutorial.html#async-sandwich
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.. _structured concurrent: https://trio.discourse.group/t/concise-definition-of-structured-concurrency/228
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.. _structured concurrent: https://trio.discourse.group/t/concise-definition-of-structured-concurrency/228
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``tractor`` is a `structured concurrent`_ "`actor model`_" built on trio_ and multiprocessing_.
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``tractor`` is a `structured concurrent`_ "`actor model`_" built on trio_ and multi-processing_.
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It is an attempt to pair trionic_ `structured concurrency`_ with
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It is an attempt to pair trionic_ `structured concurrency`_ with
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distributed Python. You can think of it as a ``trio`` *-across-processes*
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distributed Python. You can think of it as a ``trio``
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or simply as a replacement for the stdlib's `multiprocessing` but built
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*-across-processes* or simply as an opinionated replacement for the
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on async primitives for IPC.
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stdlib's ``multiprocessing`` but built on async programming primitives
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from the ground up.
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``tractor``'s nurseries lets you spawn ``trio`` *"actors"*: new Python
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Don't be scared off by this description. ``tractor`` **is just ``trio``**
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but with nurseries for process management and cancel-able IPC.
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If you understand how to work with ``trio``, ``tractor`` will give you
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the parallelism you've been missing.
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``tractor``'s nurseries let you spawn ``trio`` *"actors"*: new Python
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processes which each run a ``trio`` scheduled task tree (also known as
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processes which each run a ``trio`` scheduled task tree (also known as
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an `async sandwich`_). That is, each "*Actor*" is a new process plus
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an `async sandwich`_ - a call to ``trio.run()``). That is, each
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a `trio` runtime.
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"*Actor*" is a new process plus a ``trio`` runtime.
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Processes communicate by exchanging asynchronous messages_ and avoid
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"Actors" communicate by exchanging asynchronous messages_ and avoid
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sharing state. The intention of this model is to allow for highly
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sharing state. The intention of this model is to allow for highly
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distributed software that, through the adherence to *structured
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distributed software that, through the adherence to *structured
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concurrency*, results in systems which fail in predicatable ways.
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concurrency*, results in systems which fail in predictable and
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recoverable ways.
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The first step to grok ``tractor`` is to get the basics of ``trio`` down.
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The first step to grok ``tractor`` is to get the basics of ``trio`` down.
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A great place to start is the `trio docs`_ and this `blog post`_.
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A great place to start is the `trio docs`_ and this `blog post`_.
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@ -54,13 +61,26 @@ No PyPi release yet!
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Alluring Features
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Alluring Features
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-----------------
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-----------------
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- **It's just** ``trio``, but with SC applied to processes (aka "actors")
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- Infinitely nesteable process trees
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- Infinitely nesteable process trees
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- A built-in API for inter-process streaming
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- Built-in API for inter-process streaming
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- A (first ever?) "native" multi-core debugger for Python using `pdb++`_
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- A (first ever?) "native" multi-core debugger for Python using `pdb++`_
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- (Soon to land) `asyncio` support allowing for "infected" actors where
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- (Soon to land) ``asyncio`` support allowing for "infected" actors where
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`trio` drives the `asyncio` scheduler via the astounding "`guest mode`_"
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`trio` drives the `asyncio` scheduler via the astounding "`guest mode`_"
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The example you're probably after...
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------------------------------------
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It seems the initial query from most new users is "how do I make a worker
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pool thing?".
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``tractor`` is built to handle any SC process tree you can
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imagine; the "worker pool" pattern is a trivial special case:
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# TODO: workerpool example
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Feel like saying hi?
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Feel like saying hi?
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--------------------
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--------------------
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This project is very much coupled to the ongoing development of
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This project is very much coupled to the ongoing development of
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