pscript

library0.8.1pypypi✓ verified 33d ago

pscript is a Python-to-JavaScript compiler that allows developers to write Python code that runs directly in a JavaScript environment, such as a web browser or Node.js. It supports converting Python functions and basic data structures into their JavaScript equivalents, enabling seamless integration of Python logic into web applications. The current version is 0.8.1, with releases occurring periodically, often tied to Python version support updates.

serialization web-framework

github ↗package ↗docs ↗

Install & Compatibility

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Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

from pscript import evaljs

from pscript import evalpy

from pscript import create_js_module

This quickstart demonstrates how to define a Python function decorated with `@pyscript` to automatically generate its JavaScript equivalent. The generated JavaScript source code can then be embedded and executed in a JavaScript runtime environment.

from pscript import pyscript @pyscript def hello_js(name): # This Python code will be transpiled to JavaScript print(f'Hello, {name} from JavaScript!') return f'Greetings, {name}' # The generated JavaScript source code js_code = hello_js.source print(js_code) # Example of using the generated function in a browser context (conceptual) # You would typically inject js_code into an HTML <script> tag # For example, in browser console: # hello_js('World'); // Should print 'Hello, World from JavaScript!' to console

pscript --version

Debug

Known footguns

gotchaOnly a subset of Python's standard library and built-in functions are supported for transpilation. Functions from modules like `os`, `sys`, or complex data structures are generally not translated.

gotchapscript generates JavaScript; it does not provide a JavaScript runtime in Python. Code relying on browser APIs (e.g., `document`, `window`) will only work when the generated JS is executed within a browser environment.

gotchaPython's scoping rules, especially with closures and `nonlocal` variables, can behave subtly differently when transpiled to JavaScript. This can lead to unexpected variable capture.

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Resources

githubhttps://github.com/flexxui/pscript ↗

packagehttps://pypi.org/project/pscript/ ↗

docshttp://pscript.readthedocs.io ↗