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python's Introduction

Python compilation scripts and patches to run in the browser.

https://www.beuc.net/python-emscripten/python

Build requirements: Emscripten, python3, gcc, make, quilt

Emscripten: download prebuilt binaries (or build from source)

git clone https://github.com/emscripten-core/emsdk/
pushd emsdk/
./emsdk install 2.0.2
./emsdk activate 2.0.2
popd
source emsdk/emsdk_env.sh

Python for the web browser!

cd 3.8/
./python.sh
./package-pythonhome.sh repr.py base64.py ...
emcc ... -lpython3.8 -s EMULATE_FUNCTION_POINTER_CASTS=1

Web demo: https://www.beuc.net/python-emscripten/demo/

./webprompt.sh
emrun --serve_after_close t/index.html

Real-world showcase: RenPyWeb.

Emscripten evolves regularly with (minor) breaking changes.
If you use a different version compilation may break.

Mirrors:

python's People

Contributors

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Stargazers

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Forkers

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python's Issues

python 3.8 build requirements

The build scripts for python 2.7.10 and 2.7.18 worked without a problem with Emscripten version 1.39.18 and 2.0.2, however neither worked on the python 3.8 demo. Are there additional build requirements for the wasm build of python 3.8? I tried using gcc and clang 10.0.0.4 as the host compilers but I always get an error during the Emscripten step of python.sh.

invalid ELF header

Hi I was attempting to follow your instructions for building python 3.8 and I am getting the following error

    from decimal import Decimal
  File "/home/tom/python/3.8/build/Python-3.8.3/Lib/decimal.py", line 8, in <module>
    from _pydecimal import *
  File "/home/tom/python/3.8/build/Python-3.8.3/Lib/_pydecimal.py", line 440, in <module>
    import contextvars
  File "/home/tom/python/3.8/build/Python-3.8.3/Lib/contextvars.py", line 1, in <module>
    from _contextvars import Context, ContextVar, Token, copy_context
ImportError: /home/tom/python/3.8/build/Python-3.8.3/emscripten/build/lib.emscripten-3.8/_contextvars.so: invalid ELF header

I tried building using the latest emscripten as well as 2.0.2 and 1.39.18 mentioned in the closed thread
I am trying to build on Ubuntu 20.04.2 LTS my system python3 is Python 3.8.5

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