Release notes

Version 0.16.0

Unreleased

Pyodide includes CPython 3.8.2 #712
Pyodide files are distributed by JsDelivr, https://cdn.jsdelivr.net/pyodide/v0.16.0/full/pyodide.js The previous CDN pyodide-cdn2.iodide.io still works and there are no plans for deprecating it. However please use JsDelivr as a more sustainable solution.
FIX Only call Py_INCREF() once when proxied by PyProxy #708
Updated docker image to Debian buster
FIX Infer package tarball directory from source url #687
FIX Get last version from PyPi when installing a module via micropip #846
Updated to emscripten 1.38.34 #480
New packages: freesasa, lxml, python-sat, traits, astropy, pillow
Updated packages: numpy 1.15.4, pandas 1.0.5, matplotlib 3.3.3 among others.
Updated default --ldflags argument to pyodide_build scripts to equal what pyodide actually uses.
Drop support for serving .wasm files with incorrect mime type.
Replace C lz4 implementation with (upstream) javascript implementation. #851
New package pyodide-interrupt, useful for handling interrupts in Pyodide (see project descripion for details).
Pyodide deployment URL can now be specified with the PYODIDE_BASE_URL environment variable during build. The pyodide_dev.js is no longer distributed. To get an equivalent behavior with pyodide.js, set,
```
window.languagePluginUrl = './';
```
before loading it. #855

May 19, 2020

Upgrades pyodide to CPython 3.7.4.
micropip no longer uses a CORS proxy to install pure Python packages from PyPi. Packages are now installed from PyPi directly.
micropip can now be used from web workers.
Adds support for installing pure Python wheels from arbitrary URLs with micropip.
The CDN URL for pyodide changed to https://pyodide-cdn2.iodide.io/v0.15.0/full/pyodide.js It now supports versioning and should provide faster downloads. The latest release can be accessed via https://pyodide-cdn2.iodide.io/latest/full/
Adds messageCallback and errorCallback to {ref}pyodide.loadPackage <js_api_pyodide_loadPackage>.
Reduces the initial memory footprint (TOTAL_MEMORY) from 1 GiB to 5 MiB. More memory will be allocated as needed.
When building from source, only a subset of packages can be built by setting the PYODIDE_PACKAGES environment variable. See {ref}partial builds documentation <partial-builds> for more details.
New packages: future, autograd

Dec 11, 2019

Convert JavaScript numbers containing integers, e.g. 3.0, to a real Python long (e.g. 3).
Adds __bool__ method to for JsProxy objects.
Adds a Javascript-side auto completion function for Iodide that uses jedi.
New packages: nltk, jeudi, statsmodels, regex, cytoolz, xlrd, uncertainties

Aug 14, 2019

May 31, 2019

May 3, 2019

User improvements:

Packages with pure Python wheels can now be loaded directly from PyPI. See {ref}micropip for more information.
Thanks to PEP 562, you can now import js from Python and use it to access anything in the global Javascript namespace.
Passing a Python object to Javascript always creates the same object in Javascript. This makes APIs like removeEventListener usable.
Calling dir() in Python on a JavaScript proxy now works.
Passing an ArrayBuffer from Javascript to Python now correctly creates a memoryview object.
Pyodide now works on Safari.

Apr 12, 2019

User improvements:

Developer improvements:

The mkpkg command will now select an appropriate archive to use, rather than just using the first.
The included version of emscripten has been upgraded to 1.38.30 (plus a bugfix).
New packages: jinja2, MarkupSafe

Mar 21, 2019

User improvements:

New packages: html5lib, pygments, beautifulsoup4, soupsieve, docutils, bleach, mne

Developer improvements:

console.html provides a simple text-only interactive console to test local changes to Pyodide. The existing notebooks based on legacy versions of Iodide have been removed.
The run_docker script can now be configured with environment variables.