create a service file for the systemd as following. The file must have .service extension under /lib/systemd/system/ directory

sudo vi /lib/systemd/system/dummy.service

and add the following content in it. Change Python script filename ad location. Also update the Description.

[Unit]
Description=Dummy Service
After=multi-user.target
Conflicts=getty@tty1.service

[Service]
Type=simple
ExecStart=/usr/bin/python3 /usr/bin/dummy_service.py
StandardInput=tty-force

[Install]
WantedBy=multi-user.target