Python Blog

Pyodide: Python Executing in Browsers

⏰ April 8, 2025 • Pyodide, WASM By Mark Thompson / Web Engineer

Why Pyodide?

Leverage Python in environments where execution occurs in browser via WASM

Powerful

Run full Python programs in the browser without any setup or installation.

Pyodide

This tool compiles Python to WebAssembly, allowing execution within browser environment, making possible to run any Pythin code entirely in client side.

Example: Basic Pyodide Script

Demonstrates a simple Pyodide execution pattern


from pyodide import create_pyodide

pyodide = create_pyodide()

pyodide.run_python('''
    def calculate_sum(a, b):
        return a + b
''')
result = pyodide.globals['calculate_sum'](5, 7)
print(f"Result: {result}")

                    

This demonstrates how Python functions can be executed client-side via Pyodide WASM runtime.

Real-world Applications

Code Sharing

Create interactive notebooks in pure Python, shareable through the browser without external execution environment setup.

Client-side ML

Run machine learning models in browser using Pyodide without need for server processing.

Try Pyodide Today

Start embedding Python in your web apps to take advantage of its full potential. No server setup—just pure browser magic!

View Demonstration
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