Flask: Address already in use, regardless of port

Question

so I'm pretty new to Flask and i've been following a tutorial but I have been getting a strange problem. I have the following code, a python3 script, launched in atom with the hydrogen package enabled and jupyter. I have the virtual environment running in the background in a terminal.

from flask import Flask

app = Flask(__name__)

if __name__ == '__main__':
    app.run(debug=True)

So obviously the script is very basic and it's just used to see if i can connect to localhost, however when running it (through Hydrogen) I get the following error:

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• Serving Flask app 'main'
• Debug mode: on WARNING: This is a development server. Do not use it in a production deployment. Use a production WSGI server instead.
• Running on http://127.0.0.1:5000 Press CTRL+C to quit
• Restarting with stat Traceback (most recent call last): File "/home/uses12/.local/lib/python3.10/site-packages/ipykernel_launcher.py", line 17, in app.launch_new_instance() File "/home/uses12/.local/lib/python3.10/site-packages/traitlets/config/application.py", line 977, in launch_instance app.initialize(argv) File "/home/uses12/.local/lib/python3.10/site-packages/traitlets/config/application.py", line 110, in inner return method(app, *args, **kwargs) File "/home/uses12/.local/lib/python3.10/site-packages/ipykernel/kernelapp.py", line 666, in initialize self.init_sockets() File "/home/uses12/.local/lib/python3.10/site-packages/ipykernel/kernelapp.py", line 307, in init_sockets self.shell_port = self._bind_socket(self.shell_socket, self.shell_port) File "/home/uses12/.local/lib/python3.10/site-packages/ipykernel/kernelapp.py", line 244, in _bind_socket return self._try_bind_socket(s, port) File "/home/uses12/.local/lib/python3.10/site-packages/ipykernel/kernelapp.py", line 220, in _try_bind_socket s.bind("tcp://%s:%i" % (self.ip, port)) File "/home/uses12/.local/lib/python3.10/site-packages/zmq/sugar/socket.py", line 232, in bind super().bind(addr) File "zmq/backend/cython/socket.pyx", line 568, in zmq.backend.cython.socket.Socket.bind File "zmq/backend/cython/checkrc.pxd", line 28, in zmq.backend.cython.checkrc._check_rc zmq.error.ZMQError: Address already in use

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Upon looking online, a possible solution was to specify the port in the app. parameters, however no matter what port I specify it ALWAYS says that the address is already in use, leading me to believe that there is some deeper issue. I've done a check to see what services are using those ports and it's always just two instances of python3, I guess because Flask is set to debug. I'm completely lost. Can anyone help? Thanks so much.