Introduction
In this tutorial, we'll explore the integration of Umi, a framework primarily designed for JavaScript, with a Python-based web application. Umi allows us to run WebAssembly (Wasm) code in the browser, opening up exciting possibilities for combining Python and Rust for web development.
We will create a simple application that adds two numbers using Rust and WebAssembly within a Python Flask web application. This example demonstrates the power of WebAssembly and how it can be seamlessly integrated into Python projects.
Prerequisites
Before we dive into the code, make sure you have the following installed:
- Python
- Node.js
- Emscripten
Setting Up the Environment
To begin, let's set up our development environment:
- Create a new directory for our project:
mkdir umi-python-example
cd umi-python-example
- Initialize a Python virtual environment:
python -m venv venv
source venv/bin/activate # On Windows, use `venv\Scripts\activate`
- Install the necessary Python packages:
pip install uwsgi flask
Creating a Python Flask Application
Now, let's create a Python Flask application:
- Create a Python file called
app.py:
from flask import Flask, render_template
app = Flask(__name__)
@app.route('/')
def index():
return render_template('index.html')
if __name__ == '__main__':
app.run()
- Create a
templatesfolder and anindex.htmlfile inside it. This HTML file will serve as the entry point for our Umi application:
templates/index.html:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Umi Python Example</title>
</head>
<body>
<div id="root"></div>
<script src="/static/umi.js"></script>
</body>
</html>
Creating a Umi Application
Now, let's create a Umi application within our project:
- Run the following command to create a Umi app:
npx create-umi@2
Follow the prompts to configure your Umi project. Make sure to select the appropriate options for your use case.
- In the
umi/src/pages/index.tsxfile, we'll create a simple Rust function that adds two numbers using WebAssembly:
import React from 'react';
import styles from './index.css';
const wasm = import('../../pkg');
const App: React.FC = () => {
const [result, setResult] = React.useState<number | null>(null);
React.useEffect(() => {
wasm
.then((module) => module.add(4, 5))
.then((sum) => setResult(sum));
}, []);
return (
<div className={styles.container}>
<h1>Umi Python Example</h1>
<p>Result of adding 4 and 5 using Rust and WebAssembly:</p>
<p>{result}</p>
</div>
);
};
export default App;
Building and Running the Application
Now that our application is set up, let's build and run it:
- Build the Umi application:
cd umi
npm install
npm run build
- Copy the Umi build output to your Flask application's static folder:
cp -r dist ../static
- Run the Flask application:
python app.py
Visit http://localhost:5000 in your web browser to see your Umi-powered Python application in action.
Conclusion
In this tutorial, we've explored the integration of Umi, a JavaScript-based framework, into a Python Flask web application. By leveraging WebAssembly and Rust, we were able to add two numbers using a Umi-powered module, demonstrating the potential of combining different technologies for web development.
This example serves as a starting point for exploring more complex integrations and use cases. Umi's flexibility allows developers to harness the power of WebAssembly alongside their existing Python applications, creating a richer and more dynamic web experience.
Top comments (1)
I Like this tutorial .But i have a question , hope you will clear that .
When integrating Python code into a WebAssembly application using Umi, what are the key challenges in managing interoperability between Python and JavaScript environments, and how does Umi facilitate this process?