Latest Contributions by DuncanHornby

All, I am developing a suite of python script tools in the ArcPro 3.1.0 toolbox (atbx). A set of these tools create a stand alone table in a file geodatabase whose location is known to the tool.  The user has no control over name or output location, this is controlled in the script itself.  The code runs without error and creates the table as expected. I expose this table created in the script as a derived output as shown below: In my script I create the table, fill it with the required data and add it to the map, I also set the 4th parameter to it, the relevant add to map code is shown below:   try: aprx = arcpy.mp.ArcGISProject("CURRENT") mainMap = aprx.activeMap errorTable = arcpy.mp.Table(sPathTable) # sPathTable is a full path to the file geodatabase table mainMap.addTable(errorTable) arcpy.SetParameter(4, sPathTable) except: arcpy.AddError("Failed to add table to map, this functionality only works if tool is run from within an active ArcPro Project") return     When the tool is run straight from the toolbox, all seems to run OK. If I drag 'n' drop it into a model and then link the derived output to say another tool (in the example below it's an add field tool) the linked tool never validates and the model won't run to completion. I feel its something to do the derived output schema and the Add field tool doesn't know what's linking into it?  There is the schema property of a parameter but all the examples in the help I've been able to find talk about setting the schema of an output that is dependent on an input parameter.  My parameter is populated with a table built entirely within the script. Does anyone understand what the problem is and can provide any advice? My gut feeling its something that needs to be added to the Validation (ToolValidator code)?  Or are derived parameters meant to be "un-linkable"?     ... View more

All, I'm hoping to tap into the python community for advice on how to efficiently convert a shapely linestring back into an arcpy polyline.  I am developing a suite of python tools in the ArcPro 3.1.0 toolbox (atbx). So I read from a file geodatabase polyline geometries and convert them to a shapely linestring. I do this as shapely exposes a useful method on a polyline that does not exist in the arcpy.  A simplified snippet of my reading code (which works fine) is shown below: from shapely.wkb import loads with arcpy.da.SearchCursor(mylayer, ["SHAPE@WKB"]) as cursor: for row in cursor: geom = row[0] line = loads(bytes(geom)) # Convert arcpy geometry into shapely geometry # Do something with line using shapely Later on in my code I want to write the processed shapely linestring back into a new Feature Class using an insert cursor. What I cannot work out, hence me coming to you, is how do I efficiently turn a linestring back into an arcpy polyline geometry so I can write it back to a new file geodatabase feature class?  In the help file the arcpy polylines take arrays of points when constructing a polyline. I was expecting to find the reverse of the WKB property on a polyline?  It seems to me that arcpy allows you to convert from a polyline into alternative ways of recording geometry (json, wkb, wkt) but does not seem to consume them? ... View more