Module Object Won't Update Until Code is Restarted

问题

Not quite sure how to ask this, so I am trying to print plugged drives' volumes.

Here is a simplified version of my code:

from gi.repository import Gio
from time import sleep
import importlib
import os



def check():
    importlib.reload(Gio)
    vm = Gio.VolumeMonitor.get()
    volumes = vm.get_volumes()
    print("Volumes: {}".format([i.get_name() for i in volumes]))
    sleep(2)


while True:
    check()

So this code prints out plugged drives' volumes. No problem until now, however, when I plug a new device or unplug the current one, the list won't update. It does not detect the changes.

I tried;

• re importing Gio module

• deleting the imported module and re importing it

• calling the function from other python file

I would like to make a service out of this code in the end. I believe I could make this work with cron, however, I am trying to make it work as a service.

My service file:

[Unit]
Description=Usbmount service
StartLimitIntervalSec=0


[Service]
Type=simple
Restart=always
RestartSec=5
User=abc
ExecStart=/usr/bin/python3 /abc/myuser/usbmount.py
ExecStop=/usr/bin/python3 /abc/myuser/usbmount.py

[Install]
WantedBy=multi-user.target

Any ideas about how to solve this?

Thanks

回答1:

Adding:

os.execv("path/to/file", sys.argv)

does the trick, the script re-runs with a different PID, therefore updated results are detected and printed out.

来源：https://stackoverflow.com/questions/60037881/module-object-wont-update-until-code-is-restarted