Code Editor for app.py

import streamlit as st
import subprocess
import os
import threading
import time
import requests

st.title("Flask App Starter")

# Flask app code
flask_app_code = '''from flask import Flask

app = Flask(__name__)

@app.route('/')
def hello():
    return "Hello from Flask! This app is running alongside Streamlit."

@app.route('/api/data')
def get_data():
    return {"message": "This is data from Flask API", "status": "success"}

if __name__ == '__main__':
    app.run(debug=True, port=5000)
'''

# Display the Flask app code
st.subheader("Flask App Code")
st.code(flask_app_code, language='python')

# Save Flask app to file
if st.button("Create Flask App File"):
    with open("flask_app.py", "w") as f:
        f.write(flask_app_code)
    st.success("Flask app file created as 'flask_app.py'")

# Check if Flask app file exists
if os.path.exists("flask_app.py"):
    col1, col2 = st.columns(2)
    
    with col1:
        if st.button("Start Flask App"):
            st.info("Starting Flask app... (This will run in the background)")
            # Start Flask app in background
            def run_flask():
                subprocess.Popen(["python", "flask_app.py"])
            
            thread = threading.Thread(target=run_flask)
            thread.daemon = True
            thread.start()
            
            st.success("Flask app started! It should be running on http://localhost:5000")
    
    with col2:
        if st.button("Test Flask App"):
            try:
                # NOTE: Using corsproxy.io because we're in a WASM environment. If running locally,
                # you can remove the corsproxy.io prefix. Some websites don't work with the proxy,
                # in those cases try removing the proxy prefix.
                response = requests.get("https://corsproxy.io/?http://localhost:5000")
                st.success(f"Flask app is responding: {response.text}")
            except Exception as e:
                st.error(f"Flask app not responding: {e}")

st.subheader("Instructions")
st.write("""
1. Click "Create Flask App File" to generate the Flask application
2. Click "Start Flask App" to run the Flask server
3. Click "Test Flask App" to check if it's working
4. Your Flask app will be available at http://localhost:5000

**Note:** In a local environment, you would typically run the Flask app in a separate terminal with:
```bash
python flask_app.py
```
""")

st.subheader("Flask App Features")
st.write("""
The generated Flask app includes:
- A simple home route at `/`
- An API endpoint at `/api/data` that returns JSON
- Debug mode enabled for development
- Running on port 5000

You can extend this basic Flask app by adding more routes, templates, database connections, etc.
""")