OK, got it. I cannot reproduce the problem. Please show the full traceback.

On Wednesday, April 10, 2019 at 3:52:04 PM UTC-4, lucas wrote:
>
> oh yes I agree with you.  I think you're referring to the 3 in 
> "response.menu[1][3].append".  the list to append to the submenu is the 4th 
> element, so the 3 is correct.  but I tried the 2 instead of the 3 anyway 
> and I got the same error.  the only not to get the error is to remove or 
> comment out the "response.menu[1][3].append(LI(_class="dropdown-divider"))" 
> line altogether.  I also tried using A instead of LI since current web2py 
> converts the tuple into A when in the submenu, that gave the same error 
> also.
>
> On Wednesday, April 10, 2019 at 3:41:08 PM UTC-4, Anthony wrote:
>>
>> Indexing is zero-based in Python, so the index of the third element is 2, 
>> not 3.
>>
>> Anthony
>>
>

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