Issue with matplotlib widgets in jupyter lab

[luikalu]

Hi there,
I really enjoy using this well documented library.
However, somehow i cant get it to work with matplotlib widgets.
I get an error message when trying to plot something with matplotlib widgets enabled.
Everything works fine without ahrs imported.

my code:

%matplotlib widget
from ahrs.filters import Mahony
import matplotlib.pyplot as plt
plt.plot([1,2,3])

This results in a type error and a deprecation warning.

I created a fresh environment using the latest version of ahrs.

Can you help me solve this problem?
Best regards,
Luis

error_message.txt
packages_in_environment.txt

[Mayitzin]

This is indeed a rare situation.

I have followed your error message and I cannot find any reason for ahrs to interfere with it.

It seems the origin of all that is the package traitlets.

I found a similar issue here: matplotlib/ipympl#236

There, it seems when the user imports a package called kornia this funky warning happens, which he avoids by disabling the warnings. However, he later stopped getting those errors for some strange reason (kornia/kornia#1425)

I certainly cannot find anything messing with the backend of ipympl. I would suggest the following to test the behavior:

• Change the line %matplotlib widget to %matplotlib ipympl to activate the ipympl backend.

If that doesn't work then:

• Import the required ahrs functions in the first lines, then continue with the code.

If none of that works, post again your error traces, and we check them again.

Regards,

Mario.

[luikalu]

Hey, thanks for the reply :)

I found two workarounds:

• version 3 of ahrs installed with pip works fine

-Importing ahrs after plotting something works:
%matplotlib widget
import matplotlib.pyplot as plt
plt.plot([1,2,3])
plt.show()
from ahrs.filters import Mahony
import ahrs
plt.plot([1,2,3,5,3])
plt.show()

I also tried different versions of traitlets, jupyter lab and ipykernel and changing the backend
Seems really weird.

Best regards,
Luis