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Python

Compile Python to WebAssembly using the waspy plugin.

Overview​

The waspy plugin enables Python to WebAssembly compilation, allowing you to run Python code in WebAssembly environments.

Prerequisites​

Plugin Installation​

wasmrun plugin install waspy

Quick Start​

# Create project
mkdir my-python-wasm && cd my-python-wasm

# Create main.py
cat > main.py << 'EOF'
def greet(name):
    return f"Hello, {name}!"

def add(a, b):
    return a + b

if __name__ == "__main__":
    print(greet("World"))
    print(add(5, 3))
EOF

# Run with Wasmrun
wasmrun run .

Supported Features​

The waspy plugin supports core Python features:

  • Basic data types (int, float, str, list, dict)
  • Functions and classes
  • Control flow (if, for, while)
  • Built-in functions
  • Type annotations

Limitations​

  • Limited standard library support
  • No C extensions
  • No dynamic imports
  • Subset of Python features

Example Project​

See examples/python-hello for a complete example.

Additional Resources​