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Serving Flask app 'flask_app' (lazy loading)
 * Environment: production
   WARNING: This is a development server. Do not use it in a production deployment.
   Use a production WSGI server instead.
 * Debug mode: off
Address already in use
Port 5000 is in use by another program. Either identify and stop that program, or start the server with a different port.
Traceback (most recent call last):
  File "/usr/local/lib/python3.10/site-packages/werkzeug/serving.py", line 908, in prepare_socket
    s.bind(server_address)
OSError: [Errno 98] Address already in use

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/Andrzejek/flask_app.py", line 22, in <module>
    app.run() #port=5001
  File "/usr/local/lib/python3.10/site-packages/flask/app.py", line 920, in run
    run_simple(t.cast(str, host), port, self, **options)
  File "/usr/local/lib/python3.10/site-packages/werkzeug/serving.py", line 1059, in run_simple
    s = prepare_socket(hostname, port)
  File "/usr/local/lib/python3.10/site-packages/werkzeug/serving.py", line 927, in prepare_socket
    sys.exit(1)
SystemExit: 1