from flask import Flask app = Flask(__name__) import traceback def do_computation(): raise Exception("Secret info") # BAD @app.route('/bad') def server_bad(): try: do_computation() except Exception as e: return traceback.format_exc() # GOOD @app.route('/good') def server_good(): try: do_computation() except Exception as e: log(traceback.format_exc()) return "An internal error has occurred!"