Error 'NoneType' object has no attribute 'DEV_ModuleInit'

Hello, firstly thank you very much about your work on this project!! I think it is a great project ;)

My problem starts when it starts the phase of drawing in the ink waveshare 7.5 inches b, the logs I see are these:

pi@raspberrypi:~/MagInkCal $ python3 maginkcal.py 
/usr/lib/python3/dist-packages/requests/__init__.py:91: RequestsDependencyWarning: urllib3 (1.26.7) or chardet (3.0.4) doesn't match a supported version!
  RequestsDependencyWarning)
Starting daily calendar update
Invalid time sync command
Invalid battery output
Battery level at start: -1.000
Time synchronised to 2021-11-26 08:28:24.184037+01:00
Retrieving events between 2021-11-22T00:00:00+01:00 and 2021-12-26T23:59:59.999999+01:00...
Calendar events retrieved in 0:00:00.630859
Screenshot captured and saved to file.
Image colours processed. Extracted grayscale and red images.
EPD init...
'NoneType' object has no attribute 'DEV_ModuleInit'
Completed daily calendar update
Checking if configured to shutdown safely - Current hour: 8

As you can see, I think the problem is on third to last line:

'NoneType' object has no attribute 'DEV_ModuleInit'

I inspect a little bit your code and the error occurs in the line 115 of epdconfig.py file : spi.DEV_ModuleInit

I have searched on internet and this line should initialize the SPI module, but it does not work.

I have followed your README.md 2 or 3 times to try to see what I could have missed and I am not able to resolve my problem by myself :(

On the other way I have used the example python code from waveshare and it works correctly: epd_7in5b_V2_test.py

@speedyg0nz: Could you help me solving this problem to run your project?

By the way, I am using a Raspberry pi 4b and the SPI is enabled in my Raspberry pi 4b

An other thing very curios that happens is:

When I reboot the raspberry the waveshare example works correctly
But if I have tried to run the python3 maginkcal.py before of running waveshare example, the waveshare example does not work, the screen does not show the images of example and the running apparently is the same but faster without waiting the ending of painting of the ink screen of each image.
Nevertheless, the python3 maginkcal.py always returns the output on this comment

speedyg0nz / MagInkCal

Error 'NoneType' object has no attribute 'DEV_ModuleInit' #13