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<div class="moz-cite-prefix">On 4/03/20 18:10,
<a class="moz-txt-link-abbreviated" href="mailto:cesar@fototerra.com.br">cesar@fototerra.com.br</a> wrote:<br>
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<p class="MsoNormal">Hello!!!<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">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:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b>“Traceback (most recent call last):<o:p></o:p></b></p>
<p class="MsoNormal"><b> File
"C:\Users\cesar\AppData\Roaming\GRASS7\addons/scripts<o:p></o:p></b></p>
<p class="MsoNormal"><b>/v.centerline.py", line 319, in
<module><o:p></o:p></b></p>
<p class="MsoNormal"><b> main()<o:p></o:p></b></p>
<p class="MsoNormal"><b> File
"C:\Users\cesar\AppData\Roaming\GRASS7\addons/scripts<o:p></o:p></b></p>
<p class="MsoNormal"><b>/v.centerline.py", line 111, in main<o:p></o:p></b></p>
<p class="MsoNormal"><b> segment_input += 'P ' +
category.strip()<o:p></o:p></b></p>
<p class="MsoNormal"><b>TypeError: can only concatenate str (not
"bytes") to str<o:p></o:p></b></p>
<p class="MsoNormal"><b>(Wed Mar 4 17:27:25 2020) Comando
terminado (3 segundos) <o:p></o:p></b></p>
<p class="MsoNormal"><b>(Wed Mar 4 17:27:25
2020) <o:p></o:p></b></p>
<p class="MsoNormal"><b>v.centerline
input=Linha_rio_teste_Centerline@PERMANENT output=teste
range=2 refline=2<o:p></o:p></b></p>
<p class="MsoNormal"><b>Traceback (most recent call last):<o:p></o:p></b></p>
<p class="MsoNormal"><b> File
"C:\Users\cesar\AppData\Roaming\GRASS7\addons/scripts<o:p></o:p></b></p>
<p class="MsoNormal"><b>/v.centerline.py", line 319, in
<module><o:p></o:p></b></p>
<p class="MsoNormal"><b> main()<o:p></o:p></b></p>
<p class="MsoNormal"><b> File
"C:\Users\cesar\AppData\Roaming\GRASS7\addons/scripts<o:p></o:p></b></p>
<p class="MsoNormal"><b>/v.centerline.py", line 111, in main<o:p></o:p></b></p>
<p class="MsoNormal"><b> segment_input += 'P ' +
category.strip()<o:p></o:p></b></p>
<p class="MsoNormal"><b>TypeError: can only concatenate str (not
"bytes") to str<o:p></o:p></b></p>
<p class="MsoNormal"><b>(Wed Mar 4 17:27:28 2020) Comando
terminado (2 segundos)”<o:p></o:p></b></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I would like help to try understand what’s
happening.</p>
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<p>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.</p>
<p><br>
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<p>Moritz<br>
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