AttributeError: 'NoneType' object has no attribute '_dial'

by Martin Fitzpatrick Last updated PyQt5 FAQ
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anonymous | 2020-05-11 09:21:56 UTC | #1

When I try running demo I get the following error

python 
dial = self.parent()._dial
AttributeError: 'NoneType' object has no attribute '_dial'

I am running on Windows.

https://www.pythonguis.com/courses/custom-widgets/creating-your-own-custom-widgets/

Virginia | 2020-05-12 14:19:00 UTC | #2

I had this error too, and it turned out it was because I put the paint event in the PowerBar class instead of the _Bar class.

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AttributeError: 'NoneType' object has no attribute '_dial' was written by Martin Fitzpatrick .

Martin Fitzpatrick has been developing Python/Qt apps for 8 years. Building desktop applications to make data-analysis tools more user-friendly, Python was the obvious choice. Starting with Tk, later moving to wxWidgets and finally adopting PyQt.

AttributeError: 'NoneType' object has no attribute '_dial' was published in faq on (updated ) . Feedback & Corrections welcome in our public issue tracker.

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