OSError: [Errno 48] Address already in use [duplicate]

Answer 1

If you look closely at the traceback you will see

app.run(host='0.0.0.0', port=5000)

which means that no matter what port is passed in by -p, port 5000 is hardcoded.

You will need to modify it to use whatever variable the script is storing the -p argument as.

Answer 2

While trying to implement answer suggested by DeepSpace I stumbled across the following answer:

https://stackoverflow.com/questions/48205495/python-how-to-run-multiple-flask-apps-from-same-client-machine

To run Flask application on different machines use:

 $ export FLASK_APP=Blockchain.py
 $ flask run --host 0.0.0.0 --port 5000

Open up another terminal and use:

$ export FLASK_APP=Blockchain.py
$ flask run --host 0.0.0.0 --port 5001

Credits: https://stackoverflow.com/users/5802335/metmirr