from http.server import HTTPServer, BaseHTTPRequestHandler

class SimpleHandler(BaseHTTPRequestHandler):
    def do_GET(self):
        if self.path == '/hello_world':
            self.send_response(200)
            self.send_header('Content-type', 'text/plain')
            self.end_headers()
            self.wfile.write(b'Hello, World!')
        else:
            self.send_response(404)
            self.end_headers()
            self.wfile.write(b'Not Found')

if __name__ == '__main__':
    server = HTTPServer(('127.0.0.1', 5000), SimpleHandler)
    print('Server running on http://127.0.0.1:5000')
    server.serve_forever()