Python - Can't Kill Main Thread With Keyboardinterrupt

I'm making a simple multi-threaded port scanner. It scans all ports on host and returns open ports. The trouble is interrupting the scan. It take a lot of time for a scan to comple

Solution 1:

You made your threads daemons already, but you need to keep your main thread alive while daemon threads are there, there's how to do that: Cannot kill Python script with Ctrl-C

Solution 2:

When you create the threads add them to a list of running threads and when dealing with ctrl-C send a kill signal to each thread on the list. That way you are actively cleaning up rather than relying on it being done for you.