8000 Updates for PEP 554. by ericsnowcurrently · Pull Request #419 · python/peps · GitHub
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Updates for PEP 554. #419

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Merged
merged 18 commits into from
Sep 12, 2017
Merged

Updates for PEP 554. #419

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532a67d
Re-structure the PEP.
ericsnowcurrently Sep 12, 2017
1fa43ac
Fix internal links.
ericsnowcurrently Sep 12, 2017
06a73ee
Add CSP link.
ericsnowcurrently Sep 12, 2017
e3b168a
Drop get_main().
ericsnowcurrently Sep 12, 2017
2181af3
Enumerate shared state.
ericsnowcurrently Sep 12, 2017
db1bd77
Clarify about subinterpreters + threads.
ericsnowcurrently Sep 12, 2017
96640a4
Fix a typo.
ericsnowcurrently Sep 12, 2017
7605468
Add a note about synchronization primitives.
ericsnowcurrently Sep 12, 2017
8838271
Defer more ideas.
ericsnowcurrently Sep 12, 2017
574c9cc
Fill in the existing usage section.
ericsnowcurrently Sep 12, 2017
6e2d1b1
Drop unused anchors.
ericsnowcurrently Sep 12, 2017
a8a1b8b
Fill in the concurrency section.
ericsnowcurrently Sep 12, 2017
668609c
Add a note about interp state between runs.
ericsnowcurrently Sep 12, 2017
6bf53bb
Stub out some examples.
ericsnowcurrently Sep 12, 2017
154052d
Add a note about multi-processing.
ericsnowcurrently Sep 12, 2017
c3cbcf8
Fill in some of the examples.
ericsnowcurrently Sep 12, 2017
6bf6e06
Add a note about __main__.
ericsnowcurrently Sep 12, 2017
2c95da2
Fill out the remaining examples.
ericsnowcurrently Sep 12, 2017
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Fill in the concurrency section.
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@ericsnowcurrently
ericsnowcurrently committed Sep 12, 2017
commit a8a1b8b1c708ef241323bca5356fe3090b078a86
18 changes: 13 additions & 5 deletions pep-0554.rst
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Expand Up @@ -186,10 +186,9 @@ About FIFOs
-----------

Subinterpreters are inherently isolated (with caveats explained below),
in contrast to threads. This enables a different concurrency model than
currently exists in Python.
`Communicating Sequential Processes`_ (CSP), upon which Go's concurrency
is based, is one example of this model.
in contrast to threads. This enables `a different concurrency model
<Concurrency_>`_ than currently exists in Python.
`Communicating Sequential Processes`_ (CSP) is the prime example.

A key component of this approach to concurrency is message passing. So
providing a message/object passing mechanism alongside ``Interpreter``
Expand Down Expand Up @@ -336,7 +335,16 @@ area:
Concurrency
-----------

TBD
Concurrency is a challenging area of software development. Decades of
research and practice have led to a wide variety of concurrency models,
each with different goals. Most center on correctness and usability.

One class of concurrency models focuses on isolated threads of
execution that interoperate through some message passing scheme. A
notable example is `Communicating Sequential Processes`_ (CSP), upon
which Go's concurrency is based. The isolation inherent to
subinterpreters makes them well-suited to this approach.


Existing Usage
--------------
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