- suspendable interpreter with support for threading and greenlets
- integrated debugger and interactive remote debugging (CLI, PyCharm, …)
- flexible preprocessor based architecture to optimize Jaspy for your needs
- full support for meta-classes, builtin subclassing and operator overloading
- asynchronous imports and arbitrary-length integers based on BigInteger.js
Jaspy comes with an integrated development server and interactive debugger!
First install the dependencies, if they are not installed already:
pip3 install --user -r requirements.txt pip3 install --user ptpython pygments
Clone the repository and build the interpreter:
git clone --recursive https://github.com/koehlma/jaspy.git; cd jaspy python3 build.py # build the interpreter
Switch to the example directory and start the server in interactive mode:
cd example PYTHONPATH=../ python3 -m jaspy.cli --interactive
Visit http://localhost:8080/hello.html in your browser and click run:
Most of them are faster than Jaspy but none of them offers the unique features of Jaspy, which are the fully suspendable interpreter with threading support, the integrated debugger and the flexible, preprocessor based architecture.
Just to get an impression how slow Jaspy really is!
|Jaspy (enabled Debugger, enabled Threading)||195|
|Jaspy (disabled Debugger, enabled Threading)||199|
|Jaspy (disabled Debugger, disabled Threading)||206|
However this is a somewhat unfair benchmark because no dom manipulation or anything else browser specific is going on. Surprisingly threading and debugging introduces nearly no overhead.
This project is still in an alpha state. The APIs are unstable, it is untested and not ready for productive use. Some of the features listed above are not yet implemented.
I started this project in my semester break and now, as the new semester started, I have much less spare time. Therefore it might take a while until I will be able to invest much more time into it. However I very welcome all sorts of contributions.
If you like the ideas of Jaspy feel free to join, there are many things to do:
- implement all the batteries-included-builtin stuff of Python
- implement native JS modules for the DOM, JS objects and some Web APIs
- improve the debugger and make it fully compatible to the PyDev protocol
- complete and adjust the implementation of the Python bytecode VM
- support for Apache Cordova (Jaspy for cross platform mobile applications)
- implement a neat UI library on top of Jaspy (using a flexbox based grid)
- implement a just-in-time compiler to speed things up
- add a virtual file system (consider using: BrowserFS)
- … and, of course, your own great ideas and cool features
Do not hesitate to contribute or ask if there is anything unclear about the code or the process of contributing in general.
|jaspy:||Python server, converter and remote debugger|
Many thanks to the Brython project for the inspiration for many parts of code of the builtin-classes. Many thanks also to the book “500 Lines or Less” which is a good starting point if you want to know how the interpreter works.