2018-02-24 17:52:47 +00:00
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# Pyodide
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2018-06-05 01:11:32 +00:00
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[](https://circleci.com/gh/iodide-project/pyodide)
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2018-03-30 18:10:03 +00:00
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2018-06-07 19:50:53 +00:00
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The Python scientific stack, compiled to WebAssembly.
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2018-06-21 15:19:34 +00:00
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It provides transparent conversion of objects between Javascript and Python.
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When inside a browser, this means Python has full access to the Web APIs.
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2018-02-23 19:34:33 +00:00
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2018-06-22 18:54:59 +00:00
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**While closely related to the [iodide project](https://iodide.io), Pyodide may
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be used standalone in any context where you want to run Python inside a web
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browser.**
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2018-06-07 19:43:04 +00:00
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See [the demo](https://iodide.io/pyodide-demo/python.html)
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2018-02-23 19:34:33 +00:00
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# Building
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2018-10-08 19:33:33 +00:00
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Building is easiest on Linux. For other platforms, we recommend using
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the Docker image (described below) to build Pyodide.
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2018-02-23 19:34:33 +00:00
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2018-06-21 15:19:34 +00:00
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Make sure the prerequisites for [emsdk](https://github.com/juj/emsdk) are
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installed. Pyodide will build a custom, patched version of emsdk, so there is no
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need to build it yourself prior.
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2018-02-23 19:34:33 +00:00
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2018-06-19 14:56:17 +00:00
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Additional build prerequisites are:
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2018-06-21 15:19:34 +00:00
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- A working native compiler toolchain, enough to build CPython.
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2018-07-18 13:26:18 +00:00
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- A native Python 3.7 to run the build scripts.
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2018-06-21 15:19:34 +00:00
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- PyYAML
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2018-06-19 14:56:17 +00:00
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- [lessc](https://lesscss.org/) to compile less to css.
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- [uglifyjs](https://github.com/mishoo/UglifyJS) to minify Javascript builds.
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2018-07-24 13:10:05 +00:00
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- [ccache](https://ccache.samba.org) (optional) recommended for much faster rebuilds.
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2018-04-26 15:04:28 +00:00
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2018-07-24 15:18:01 +00:00
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2018-06-21 15:19:34 +00:00
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`make`
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2018-03-30 14:51:13 +00:00
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2018-10-08 19:33:33 +00:00
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## Using Docker
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We provide a Debian-based Docker image on Docker Hub with the dependencies
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already installed to make it easier to build Pyodide.
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1. Install Docker
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2. From a git checkout of Pyodide, run `./run_docker`
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3. cd `/src`
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4. Run `make` to build.
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You can edit the files in your source checkout on your host machine, and then
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repeatedly run `make` inside the Docker environment to test your changes.
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2018-03-30 14:51:13 +00:00
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# Testing
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2018-06-21 15:19:34 +00:00
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Install the following dependencies into the default Python installation:
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2018-03-30 14:51:13 +00:00
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2018-07-19 15:16:10 +00:00
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`pip install pytest selenium pytest-instafail`
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2018-03-30 14:51:13 +00:00
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2018-07-26 09:45:00 +00:00
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Install [geckodriver](https://github.com/mozilla/geckodriver/releases) and
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[chromedriver](https://sites.google.com/a/chromium.org/chromedriver/downloads) somewhere
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2018-06-21 15:19:34 +00:00
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on your `PATH`.
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2018-03-30 14:51:13 +00:00
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2018-08-28 09:59:12 +00:00
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`pytest test/`
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2018-04-11 14:17:02 +00:00
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# Benchmarking
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2018-06-21 15:19:34 +00:00
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Install the same dependencies as for testing.
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2018-04-11 14:17:02 +00:00
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2018-06-21 15:19:34 +00:00
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`make benchmark`
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2018-06-14 18:19:08 +00:00
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# Linting
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2018-06-21 15:19:34 +00:00
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Python is linted with `flake8`. C and Javascript are linted with `clang-format`.
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2018-06-14 18:19:08 +00:00
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2018-06-21 15:19:34 +00:00
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`make lint`
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