"object has no attribute" error

[tompayne36]

Hi,

I am trying to get simplemonitor to work on my Raspberry Pi but am getting an "object has no attribute" error. I have tried to do this on an Ubuntu image on AWS EC2 but get the identical error. I believe I am using the latest "git clone" and have installed the "arrow" package (my first error).

I am new to python on linux (and github), so apologize if this is a noob question.

========

ubuntu@ip-172-31-53-23:$ cd simplemonitor/
ubuntu@ip-172-31-53-23:/simplemonitor$ python3 monitor.py
Traceback (most recent call last):
File "monitor.py", line 1, in
from simplemonitor import monitor
File "/home/ubuntu/simplemonitor/simplemonitor/monitor.py", line 10, in
from .simplemonitor import SimpleMonitor
File "/home/ubuntu/simplemonitor/simplemonitor/simplemonitor.py", line 15, in
from .Alerters.alerter import Alerter
File "/home/ubuntu/simplemonitor/simplemonitor/Alerters/init.py", line 5, in
from .bulksms import BulkSMSAlerter
File "/home/ubuntu/simplemonitor/simplemonitor/Alerters/bulksms.py", line 7, in
from ..Monitors.monitor import Monitor
File "/home/ubuntu/simplemonitor/simplemonitor/Monitors/init.py", line 23, in
from .service import (
File "/home/ubuntu/simplemonitor/simplemonitor/Monitors/service.py", line 346, in
class MonitorProcess(Monitor):
File "/home/ubuntu/simplemonitor/simplemonitor/Monitors/service.py", line 376, in MonitorProcess
) -> List[psutil.Process]:
AttributeError: 'NoneType' object has no attribute 'Process'
ubuntu@ip-172-31-53-23:~/simplemonitor$

[jamesoff]

Hi! Sorry you've having problems. This is actually useful, as I've seen that error intermittently myself before but not managed to reproduce it to debug it. Would you be able to share your monitors.ini? At least any "process" monitors you have (as that's the one the error is occurring in).

Edit: Looking at the code, I think this is actually a different error to my intermittent one; I think you're missing the psutil package too. You probably need to do pip install . in the directory you've got simplemonitor cloned into, which should pull in all the packages it depends on.

[tompayne36]

Thanks..."pip install ." is new to me. I am making more progress now after installing psutil. I am now working through likely issues in my monitor.ini and monitors.ini files, but that is on me.

[tompayne36]

Making progress...now only getting this warning:

/usr/lib/python3/dist-packages/requests/init.py:91: RequestsDependencyWarning: urllib3 (1.26.2) or chardet (3.0.4) doesn't match a supported version!
RequestsDependencyWarning)

But I assume I can ignore this for now...

[jamesoff]

If it's working then yes :)

Might be worth creating a virtualenv (in your simplemonitor git dir: python3 -m venv .venv; source .venv/bin/activate) and then doing pip install ., which will get you all the right versions of the libraries needed. You'll need to do the source command there before running the script in a new terminal or anything.

(Docs for virtualenv are here: https://docs.python.org/3/library/venv.html)