Getting NoneType does not support indexing on line 1 on an import from ._anvil_designer

Anvil Q&A
1

This is happening when im running an app locally, the usual first line of any form looks like this: from ._anvil_designer import FormnameTemplate and mine seems to work for all forms but one where I get the error mentioned in the title, any ideas would be greatly appreciated

2

My first idea is to show us the lines of code that are involved. Odds are, there is an unintentional typo there.

3

sure thing,
its literally just this import when running in a container

from ._anvil_designer import Attenuator_UITemplate
4

Thanks! And does this actually match the name of the form, as shown in your App Navigation pane:
image
?

5

yes I can confirm it does

6

Ok, I’m stumped. I’ve had this happen at Design time, but never at run time.

7

A clone link might be useful here to get more context.

1 Like
8

here is a clone link to the problematic part of the app

9

I have deduced its an issue with the custom components.