app.py

import os
import subprocess
import tempfile
from flask import Flask, request, jsonify
from flask_cors import CORS

app = Flask(__name__)
CORS(app)

@app.route('/')
def home():
    return jsonify({
        "status": "ok",
        "message": "Python interpreter backend is running. Send POST requests to /api/run-python"
    })

@app.route('/api/run-python', methods=['POST'])
def run_python():
    code = request.json.get('code', '')
    user_input = request.json.get('input', '')

    if not code:
        return jsonify({'error': 'No code provided.'}), 400

    temp_file_path = None
    try:
        # Create a temporary file to write the Python code
        with tempfile.NamedTemporaryFile(suffix=".py", delete=False, mode='w', encoding='utf-8') as temp_file:
            temp_file.write(code)
            temp_file_path = temp_file.name

        # Run the Python script as a subprocess
        run_process = subprocess.run(
            ['python', temp_file_path],  # The command to run
            input=user_input,
            capture_output=True,
            text=True,
            timeout=15  # Set a timeout for safety
        )

        # Check if the process had errors
        if run_process.returncode != 0:
            return jsonify({'errors': run_process.stderr})
        else:
            return jsonify({'output': run_process.stdout})

    except subprocess.TimeoutExpired:
        return jsonify({'error': 'Code execution timed out (15 seconds limit).'}), 408
    except Exception as e:
        return jsonify({'error': f"An unexpected error occurred: {str(e)}"}), 500
    finally:
        # Clean up the temporary file, even if an error occurred
        if temp_file_path and os.path.exists(temp_file_path):
            os.remove(temp_file_path)

if __name__ == '__main__':
    app.run(host="0.0.0.0", port=7860)