Python Systemd 服务的 ImportError

Question

I am trying to start a python script on a raspby via a systemd service, but it cannot find any of the modules installed via pip3 and gives the error:

raspberrypi python3[1017]: ModuleNotFoundError: No module named 'paho'

Running the same script via SSH terminal works fine. From my research, it could relate to the PYTHONPATH, though I have been unable to find it in.bashrc

The modules that cannot be found are installed here:

./.local/lib/python3.7/site-packages (1.5.0)

This is the service file in /etc/systemd/user/mytest.service which starts the script unsuccessfully:

[Unit]
Description=TestScript Service
After=network-online.target

[Service]
Type=idle
ExecStart=/usr/bin/python3 /home/pi/MyProject/my_script.py > /home/pi/my_script.log 2>&1

[Install]
WantedBy=network-online.target

How can I let the service know, where the modules are located?

Kind regards

Answer 1

Here's is a quick fix to the problem:

By specifying a User in the.service file under [Service], the python script will find all installed libraries.

[Service]
User=pi