Run a service in a specific time range using systemd

example-cleanup.sh

#!/bin/bash

for unit in test_python_stop.service test_python_{start,stop}.timer
do
    systemctl --user stop $unit
    systemctl --user disable $unit
done
systemctl --user stop test_python.service
rm -f \
  ~/.config/systemd/user/test_python.service \
  ~/.config/systemd/user/test_python_stop.service \
  ~/.config/systemd/user/test_python_start.timer \
  ~/.config/systemd/user/test_python_stop.timer \
  ~/bin/test_python.py
systemctl --user daemon-reload

example-setup.sh

#!/bin/bash

mkdir -p ~/bin
cat << EOF > ~/bin/test_python.py
#!/usr/bin/env python3
import time
counter = 0
while True:
    counter += 1
    print(counter)
    time.sleep(5)
EOF
chmod +x ~/bin/test_python.py

cat << EOF > ~/.config/systemd/user/test_python.service
[Unit]
Description=Test Python
[Service]
ExecStart=/usr/bin/python3 -u %h/bin/test_python.py
[Install]
WantedBy=default.target
EOF

cat << EOF > ~/.config/systemd/user/test_python_start.timer
[Unit] 
Description=Test Python - Start timer
[Timer]
Unit=test_python.service
Persistent=true
OnBootSec=60s
OnCalendar=*-*-* 10:00:00
[Install] 
WantedBy=timers.target
EOF

cat << EOF > ~/.config/systemd/user/test_python_stop.service
[Unit] 
Description=Test Python - Stop service
Conflicts=test_python.service
[Service]
ExecStart=echo
[Install] 
WantedBy=default.target
EOF

cat << EOF > ~/.config/systemd/user/test_python_stop.timer
[Unit] 
Description=Test Python - Stop timer
Conflicts=test_python.service
[Timer]
Unit=test_python_stop.service
OnCalendar=*-*-* 22:00:00
[Install] 
WantedBy=timers.target
EOF

systemctl --user daemon-reload
for unit in test_python_stop.service test_python_{start,stop}.timer
do
    systemctl --user enable $unit
done
systemctl --user restart timers.target

systemctl --user list-timers --all