For Django newbies, there will be many problems during the learning process, which often encounters the problem is Error:
That port is already in Use.
There are two ways to solve (assuming 8000 ports):
python manage.py runserver 8001
2.1 Enter the
lsof -i: 8000 in the terminal, list the process information.
2.2 Then, find the PID number of the process, such as my PID number is 2277.
kill -9 PID, such as
KILL-9 2277, you can turn off the port.
python management.py runserver to continue using the 8000 port.