[LINUX] I made a daemon with Python

I made a daemon with Python, so a memo of the procedure

environment

environment	version
OS	2020-05-27-raspios-buster-arm64
Python	3.7.3
python3-systemd	234-2+b1

What i did

Install python-systemd
sudo apt-get install python-systemd python3-systemd
Create ~ / foo.py with the following contents

from systemd import journal
journal.send('Hello world')
journal.send('Hello, again, world', FIELD2='Greetings!', FIELD3='Guten tag')
journal.send('Binary message', BINARY=b'\xde\xad\xbe\xef')

Grant execute permission
chmod 755 ~/foo.py
Create a systemd definition file as follows
Write the following content as sudo nano /etc/systemd/system/foo.service

[Unit]
Description = Foo

[Service]
ExecStart = python3 /home/pi/foo.py
Restart = always
Type = simple

[Install]
WantedBy = multi-user.target

Enable the daemon
sudo systemctl enable foo.service
Start the daemon
sudo systemctl start foo.service
View the journal
systemctl status roomenv.service
Success if some log comes out
If you write sudo in ʻExecStart`, it will not work (it seems to work with root privileges)

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