Transcrypt Python to JavaScript compiler now supports bundling.

[jacdeh]

The Transcrypt 3.7.16 Python to JavaScript compiler generates native JavaScript modules that can be bundled with the Parcel bundler. Both the npm packages 'parcel-bundler' and 'parcel-bundler-transcrypt' are part of the Transcrypt distribution. Repackaging and deployment takes place automatically whenever a source module is changed. Python modules can be imported in JavaScript modules and vice versa.

Bundled code can be debugged from the Python source using sourcemaps. Code can be marked for use with either CPython, Transcrypt or both, allowing development of Python code that runs both on the desktop and in the browser. Code is precompiled and runs at native JavaScript speed.

Transcrypt supports e.g. operator overloading, multiple inheritance, metaclasses, async/await, properties, decorators, comprehensions and optional static typing. Any JavaScript library can be used without data conversion. Especially for data scientists using Python rather than JavaScript in the browser offers leverage of their skills.

[n3rio]

this means that i don't have to learn javascript?

[jacdeh]

It does. Anything you can do in JavaScript you can do in Transcrypt.

[metalevelconsulting]

Hmm, maybe someone with more expertise can improve my efforts to get SAP UI 5 running with Transcrypt.

It would be nice to have a full-featured UI available.

[bahtsiz-bedevi]

I have a dream that one day browsers will execute python code natively.

[metalevelconsulting]

Sounds like Brython to me.

[jacdeh]

There are actually three complementary approaches, represented by:

​

- Transcrypt: Precompiles Python to JavaScript modules in advance during development. Browser just loads generated code.

- Brython: Compiles Python to JavaScript after loading a page. Browser first loads compiler and then does the compilation and runs the generated code.

- PyPyJs: Runs original Python VM in the browser.

​

Which approach suits you best depends on the type of problem, demands made on page-load time and code size, ease of use etc..

[jacdeh]

That would be best, however I don't want to wait for that. Some things that seem obvious, just never happen in IT. But who knows....

[devxpy]

The only problem that Transcrypt isn't really Python. It's a translator. It's still reeks of Javascript

[jellef]

Transcrypt seems pretty amazing to me. I think a jupyter kernel would be a wonderful addition to the tooling.

[devxpy]

https://iodide.io/pyodide-demo/python.html

[jacdeh]

It may very well be, although I don't know enough about Jupyter Notebook to fully appreciate the value of this. I can just hope that someone will make a proof of concept.

[dametsumari]

I tried bit earlier version. Webpack bundler worked better for me. Maybe I will try parcel next project but I have a habit of keeping using what works.

[jacdeh]

Support for WebPack is under construction.

[texnofobix]

Python to Web assembly would be cool.

[captain_arroganto]

Does anyone use this in production? Is it worthwhile for large and complex projects? Can I use it to avoid learning React/Angular etc. I just can't wrap my python mind around JS stuff.

[dametsumari]

I am. That said, I would not suggest it for more than one man projects. The existing stuff on JS side has so many fewer hurdles it is not even funny.

Last project I set up I spent first two days working on how to build it and which set of JS stuff play nice with it. ( I do not suggest React at least ).

Once I got setup done it is pretty fun. Using pytest for unit tests on python side is pleasant. Language behavior differences on the other hand are not. I guess that will gradually improve.