arcpy.da.InsertCursor geometry

johnbrosowsky

I am attempting to insert a feature into feature class based on feature in another feature class (both have identical structure) like this:

input = arcpy.da.SearchCursor(fc, "*", where_clause=(expression))
output = arcpy.da.InsertCursor(tc,['risk','SHAPE@'])

for row in cursor:
   risk_factor = row[5]
   if risk_factor == "423123fasq":
     updateRows.insertRow([["high risk",row[1]])

... but I think I am not handling geometry correctly in insertRow as I get error "TypeError: cannot alter multipart geometry type".  They are polyline features.  Any ideas how to handle geometry correctly in this case?

Thanks!

RandyBurton

I noticed you are using a wildcard for your fields.  I would avoid this as the fields may be in a different order from what you are expecting.  Also, when you say the features both have the identical structure, you mean both field names/types match along with the geometry type and spatial reference?

If you are only interested in the geometry and risk field, you might try something like:

fc <SPAN class="operator token">=</SPAN> <SPAN class="string token">'inputFeature'</SPAN>  <SPAN class="comment token"># feature for SearchCursor</SPAN>
tc <SPAN class="operator token">=</SPAN> <SPAN class="string token">'outputFeature'</SPAN> <SPAN class="comment token"># feature for InsertCursor</SPAN>

expression <SPAN class="operator token">=</SPAN> <SPAN class="string token">'some expression'</SPAN>

<SPAN class="comment token"># you should specify the fields for your search cursor (don't use wildcard)</SPAN>
<SPAN class="comment token"># this way, you can be sure what they are when you reference them</SPAN>
<SPAN class="comment token"># also, assuming that fc and tc use the same field 'risk'</SPAN>

fields <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="string token">'SHAPE@'</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="string token">'risk'</SPAN><SPAN class="punctuation token">]</SPAN> 

<SPAN class="comment token"># start an insert cursor</SPAN>
insertCursor <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>da<SPAN class="punctuation token">.</SPAN>InsertCursor<SPAN class="punctuation token">(</SPAN>tc<SPAN class="punctuation token">,</SPAN> fields<SPAN class="punctuation token">)</SPAN>

<SPAN class="keyword token">with</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>da<SPAN class="punctuation token">.</SPAN>SearchCursor<SPAN class="punctuation token">(</SPAN>fc<SPAN class="punctuation token">,</SPAN> fields<SPAN class="punctuation token">,</SPAN> where_clause<SPAN class="operator token">=</SPAN>expression<SPAN class="punctuation token">)</SPAN> <SPAN class="keyword token">as</SPAN> cursor<SPAN class="punctuation token">:</SPAN>
    <SPAN class="keyword token">for</SPAN> row <SPAN class="keyword token">in</SPAN> cursor<SPAN class="punctuation token">:</SPAN>
        risk_factor <SPAN class="operator token">=</SPAN> row<SPAN class="punctuation token">[</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">]</SPAN>
        <SPAN class="keyword token">if</SPAN> risk_factor <SPAN class="operator token">==</SPAN> <SPAN class="string token">"423123fasq"</SPAN><SPAN class="punctuation token">:</SPAN>
            <SPAN class="comment token"># insert feature only if risk_factor is "423123fasq"</SPAN>
            insertCursor<SPAN class="punctuation token">.</SPAN>insertRow<SPAN class="punctuation token">(</SPAN>row<SPAN class="punctuation token">)</SPAN>‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍<SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>