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‎.gitignore

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mpbuild
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pybuild
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micropython
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cpython
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emsdk

‎Makefile

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SHELL := /bin/bash
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all:
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@echo "\nThere's no default Makefil target right now. Try\n\n"
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@echo "make setup - clone the required repositories."
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@echo "make update - update the emsdk compiler."
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@echo "make refresh - re-compile MicroPython for WASM into build."
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setup:
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git clone https://github.com/emscripten-core/emsdk.git
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git clone https://github.com/micropython/micropython.git
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git clone https://github.com/python/cpython.git
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update:
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cd emsdk && git pull && ./emsdk install latest && ./emsdk activate latest
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mp:
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rm -rf mpbuild
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$(MAKE) -C micropython/mpy-cross
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./emsdk/emsdk activate latest && source emsdk/emsdk_env.sh && $(MAKE) -C micropython/ports/webassembly
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cp -r micropython/ports/webassembly/build mpbuild
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py:
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rm -rf pybuild
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./cpython/Tools/wasm/wasm_build.py build
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./emsdk/emsdk activate latest && source emsdk/emsdk_env.sh && ./cpython/Tools/wasm/wasm_build.py emscripten-browser
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cp -r cpython/builddir/emscripten-browser pybuild
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serve:
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python -m http.server

‎README.md

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# PyScript Lite
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A small, simple kernel of PyScript, made for testing purposes.
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This is the way:
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* Obvious code.
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* Simple is good.
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* Build for change.
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* No dependencies.
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* Pluggable.
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This is a solid foundation for lightweight testing of Python runtimes that
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target WASM. Inspired by code in the "real" PyTest website.
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Complexity, edge cases, customization and mess is confined to plugins.
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That is all.

‎index.html

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<!DOCTYPE html>
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<html lang="en">
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<head>
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<script src="mpbuild/micropython.js"></script>
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</head>
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<body>
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<py-script>
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def hello(name="World"):
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return "Hello, " + name
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print(hello())
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</py-script>
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<pre><code id="mp_js_stdout"></code></pre>
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</body>
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<script src="pyscript.js" type="module"></script>
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</html>

‎pyscript.js

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"use strict";
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class PyScript extends HTMLElement {
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connectedCallback() {
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var code = this.textContent;
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this.textContent = "";
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// MicroPython things happen here...
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mp_js_stdout.addEventListener('print', function(e) {
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this.innerText = this.innerText + e.data;
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}, false);
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var mp_js_startup = Module['onRuntimeInitialized'];
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Module["onRuntimeInitialized"] = async function() {
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mp_js_startup();
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mp_js_init(64 *1024);
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mp_js_do_str(code);
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}
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}
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}
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customElements.define('py-script', PyScript);

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