(changelog)=
# Release notes

## Version 0.16.0
*Unreleased*

- Pyodide includes CPython 3.8.2
  [#712](https://github.com/iodide-project/pyodide/pull/712)
- Pyodide files are distributed by [JsDelivr](https://www.jsdelivr.com/),
  `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](https://github.com/iodide-project/pyodide/pull/708)
- Updated docker image to Debian buster
- FIX Infer package tarball directory from source url
  [#687](https://github.com/iodide-project/pyodide/pull/687)
- FIX Get last version from PyPi when installing a module via micropip
  [#846](https://github.com/iodide-project/pyodide/pull/846)
- Updated to emscripten 1.38.34
  [#480](https://github.com/iodide-project/pyodide/pull/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](https://github.com/iodide-project/pyodide/pull/851)
- New package
  [pyodide-interrupt](https://pypi.org/project/pyodide-interrupts/), 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](https://github.com/iodide-project/pyodide/pull/855)


## Version 0.15.0
*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

## Version 0.14.3
*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

## Version 0.14.0
*Aug 14, 2019*

- The built-in `sqlite` and `bz2` modules of Python are now enabled.
- Adds support for auto-completion based on jedi when used in iodide

## Version 0.13.0
*May 31, 2019*

- Tagged versions of Pyodide are now deployed to Netlify.

## Version 0.12.0
*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.

## Version 0.11.0
*Apr 12, 2019*

**User improvements:**

- Support for built-in modules:
  - `sqlite`, `crypt`

- New packages: `mne`

**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`

## Version 0.10.0
*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.