2019-06-22 22:22:39 +00:00
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Pyodide
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=======
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2021-12-13 17:36:35 +00:00
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Pyodide is a Python distribution for the browser and Node.js based on WebAssembly.
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2019-06-22 22:22:39 +00:00
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2021-12-13 17:36:35 +00:00
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What is Pyodide?
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----------------
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2019-06-22 22:22:39 +00:00
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2022-01-04 15:46:00 +00:00
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Pyodide is a port of CPython to WebAssembly/`Emscripten <https://emscripten.org/>`_.
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2019-06-22 22:22:39 +00:00
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2021-12-13 17:36:35 +00:00
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Pyodide makes it possible to install and run Python packages in the browser with
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`micropip <https://pyodide.org/en/stable/usage/api/micropip-api.html>`_. Any pure
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Python package with a wheel available on PyPI is supported. Many packages with C
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extensions have also been ported for use with Pyodide. These include many
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general-purpose packages such as regex, pyyaml, lxml and scientific Python
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packages including numpy, pandas, scipy, matplotlib, and scikit-learn.
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Pyodide comes with a robust Javascript ⟺ Python foreign function interface so
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that you can freely mix these two languages in your code with minimal
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friction. This includes full support for error handling (throw an error in one
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language, catch it in the other), async/await, and much more.
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When used inside a browser, Python has full access to the Web APIs.
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Try Pyodide
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-----------
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Try Pyodide in a
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`REPL <./console.html>`_ directly in
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your browser (no installation needed).
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Table of contents
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-----------------
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Using Pyodide
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^^^^^^^^^^^^^
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.. toctree::
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:maxdepth: 1
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usage/quickstart.md
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usage/downloading-and-deploying.md
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usage/index.md
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usage/loading-packages.md
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usage/loading-files.md
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2021-05-02 13:42:28 +00:00
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usage/wasm-constraints.md
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usage/type-conversions.md
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usage/keyboard-interrupts.md
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Implement more detailed streams support (#3268)
Resolves https://github.com/pyodide/pyodide/issues/3112
This adds a carefully designed API for controlling stdin, stdout, and stderr. It changes
the default behavior to be a bit more useful, though in doing so introduces some mild
backwards incompatibility. In particular:
1. By default, stdin reads directly from `process.stdin` in node (as before) and raises an
error if in browser (not as before).
2. By default, stdout writes directly to `process.stdout` in node (before it called console.log)
and calls console.log in browser (as before).
3. By default, stderr writes directly to `process.stderr` in node (before it called console.warn)
and calls console.warn in browser (as before).
4. In all three cases, by default isatty(stdin/stdout/stderr) is true in node and false in browser
(in the browser it used to be true).
5. As before, if you pass `stdin`, `stdout`, or `stderr` as arguments to `loadPyodide`, `isatty` of
the corresponding stream is set to false.
The stdin function is now more flexible: we now correctly handle the case where it returns an
ArrayBuffer or ArrayBufferView.
I also added 3 new functions to set streams after Pyodide is loaded which offer additional
control:
* `setStdin({stdin?, error?, isatty = false})` -- Sets the stdin function. The stdin function takes no
arguments and should return null, undefined, a string, or a buffer. Sets and `isatty(stdin)` to
`isatty` (by default `false`). If error is true, set stdin to always raise an EIO error when it is read.
* `setStdout({raw?, batched?, isatty = false})` -- If neither raw nor batched is passed, restore
default stdout behavior. If rwa is passed, the raw stdout function receives a byte which it should
interpret as a utf8 character code. Sets `isatty(stdout)` to isatty (by default `false`). If batched is
passed but not raw, it sets a batched stdout function. The stdout function receives a string and
should do something with it. In this case it ignores isatty and sets isatty(stdout) to false.
* `setStderr({raw?, batched?, isatty = false})` -- same but with stderr.
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usage/streams.md
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usage/api-reference.md
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usage/faq.md
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Development
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^^^^^^^^^^^
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2022-05-11 13:59:19 +00:00
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The Development section helps Pyodide contributors to find information about the
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development process including making packages to support third party libraries.
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.. toctree::
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:maxdepth: 1
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:caption: Development
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development/building-from-sources.md
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development/new-packages.md
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development/building-and-testing-packages.md
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development/contributing.md
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development/testing.md
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development/debugging.md
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Project
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^^^^^^^
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The Project section gives additional information about the project's
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organization and latest releases.
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2019-06-22 22:22:39 +00:00
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.. toctree::
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:maxdepth: 1
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2021-04-20 21:28:33 +00:00
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:caption: Project
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project/about.md
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project/roadmap.md
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project/code-of-conduct.md
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project/governance.md
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project/changelog.md
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project/related-projects.md
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Communication
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-------------
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- Blog: `blog.pyodide.org <https://blog.pyodide.org/>`_
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- Mailing list: `mail.python.org/mailman3/lists/pyodide.python.org/ <https://mail.python.org/mailman3/lists/pyodide.python.org/>`_
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- Gitter: `gitter.im/pyodide/community <https://gitter.im/pyodide/community>`_
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- Twitter: `twitter.com/pyodide <https://twitter.com/pyodide>`_
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- Stack Overflow: `stackoverflow.com/questions/tagged/pyodide <https://stackoverflow.com/questions/tagged/pyodide>`_
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