[GRASS-user] v.centerline addon

[Moritz Lennert]

On 4/03/20 18:10, cesar at fototerra.com.br wrote:
>
> Hello!!!
>
> I’m new user on GRASS and I’m trying to execute the addon v.centerline 
> on  GRASS 7.9. As input I’m using a shapefile containing line 
> (MultiLineString) as geometry and when I have run the v.centerline an 
> erro is returning:
>
> *“Traceback (most recent call last):*
>
> *  File "C:\Users\cesar\AppData\Roaming\GRASS7\addons/scripts*
>
> */v.centerline.py", line 319, in <module>*
>
> *    main()*
>
> *  File "C:\Users\cesar\AppData\Roaming\GRASS7\addons/scripts*
>
> */v.centerline.py", line 111, in main*
>
> *    segment_input += 'P ' + category.strip()*
>
> *TypeError: can only concatenate str (not "bytes") to str*
>
> *(Wed Mar  4 17:27:25 2020) Comando terminado (3 segundos) *
>
> *(Wed Mar  4 17:27:25 2020) *
>
> *v.centerline input=Linha_rio_teste_Centerline at PERMANENT output=teste 
> range=2 refline=2*
>
> *Traceback (most recent call last):*
>
> *  File "C:\Users\cesar\AppData\Roaming\GRASS7\addons/scripts*
>
> */v.centerline.py", line 319, in <module>*
>
> *    main()*
>
> *  File "C:\Users\cesar\AppData\Roaming\GRASS7\addons/scripts*
>
> */v.centerline.py", line 111, in main*
>
> *    segment_input += 'P ' + category.strip()*
>
> *TypeError: can only concatenate str (not "bytes") to str*
>
> *(Wed Mar  4 17:27:28 2020) Comando terminado (2 segundos)”*
>
> I would like help to try understand what’s happening.
>

I would guess that this is a Python 3 vs Python 2 issue. I never updated 
the addon to Python 3. If someone else can do this, it would be great, 
as I'm currently on mission abroad and do not really have the necessary 
access to the development tools to do this from here.


Moritz

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