Iteration over non-sequence of type NoneType

@Jack_Zeng wrote:

Hi all,

I am trying to write a script to let python to help to get panels in a row.
This script could be useful when you have thousands of panels.
The strategy is to provide the first panel in the row and specify a vector for selection then let python to select the rest on the row from the panel collection.

Select panels in a row.jpg3307x1146 157 KB

It is almost getting there but I got an error saying" Iteration over non-sequence of type NoneType".
I am not sure what does it mean but I am pretty sure it occur due to I have remove a panel from the list of panels.
Appreciate if someone can tell me why it would be a problem -- why can't I remove a panel? I thought a list should be dynamic and you can always modify it...

Select panels in a row 02.JPG1376x783 95.8 KB

Select panels in a row.3dm (93.5 KB)
Select panels in a row.py (1.2 KB)

Thanks for any help,

Jack

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