System Exit Error

[bishalbarkalita]

When the file app.py was tried to run Jupyter Notebook the error shown are
SystemExit Traceback (most recent call last)
Input In [1], in <cell line: 19>()
17 mysql = MySQL(app)
19 if name == 'main':
---> 20 app.run(debug=True, port=8000)

File ~\anaconda3\lib\site-packages\flask\app.py:990, in Flask.run(self, host, port, debug, load_dotenv, **options)
987 from werkzeug.serving import run_simple
989 try:
--> 990 run_simple(host, port, self, **options)
991 finally:
992 # reset the first request information if the development server
993 # reset normally. This makes it possible to restart the server
994 # without reloader and that stuff from an interactive shell.
995 self._got_first_request = False

File ~\anaconda3\lib\site-packages\werkzeug\serving.py:1009, in run_simple(hostname, port, application, use_reloader, use_debugger, use_evalex, extra_files, exclude_patterns, reloader_interval, reloader_type, threaded, processes, request_handler, static_files, passthrough_errors, ssl_context)
1005 os.unlink(server_address)
1007 from ._reloader import run_with_reloader as _rwr
-> 1009 _rwr(
1010 inner,
1011 extra_files=extra_files,
1012 exclude_patterns=exclude_patterns,
1013 interval=reloader_interval,
1014 reloader_type=reloader_type,
1015 )
1016 else:
1017 inner()

File ~\anaconda3\lib\site-packages\werkzeug_reloader.py:428, in run_with_reloader(main_func, extra_files, exclude_patterns, interval, reloader_type)
426 reloader.run()
427 else:
--> 428 sys.exit(reloader.restart_with_reloader())
429 except KeyboardInterrupt:
430 pass

SystemExit: 1

Can you solve the problem?