def application(environ, start_response):
    import sys
    output = f"Python executable: {sys.executable}\nPython version: {sys.version}\n"
    status = '200 OK'
    headers = [('Content-type', 'text/plain; charset=utf-8')]
    start_response(status, headers)
    return [b"<h1>Hello from WSGI Python!</h1>"]