topic Re: addin: bad selection from tool in Python Questions

addin: bad selection from tool

KevinBell — Mon, 23 Jun 2014 16:32:05 GMT

I'm trying to get the id's of polygons that I select with a Python addin tool, but it is returning all the features, no just my selection. Any ideas?

import arcpy import pythonaddins  global coords, mxd, df, ids coords = [] ids = []  mxdPath = r'E:\gis\Atlas\Atlas.mxd' mxd = arcpy.mapping.MapDocument(mxdPath)  class DrawPolygon(object):     """Implementation for searchAtlas_addin.drawPolygonTl (Tool)"""     def __init__(self):         self.enabled = True         self.shape = "Line"       def onLine(self, line_geometry):             array = arcpy.Array()             part = line_geometry.getPart(0)             for pt in part:                 array.add(pt)                             polygon = arcpy.Polygon(array)             getBlockIDs(polygon)   def getBlockIDs(inPolygon):     print 'getting block ids'     fc = r'E:\gis\Atlas\default.gdb\blocks'     arcpy.MakeFeatureLayer_management(fc, 'blocksLyr')     arcpy.MakeFeatureLayer_management(inPolygon, 'aoiLyr')     arcpy.SelectLayerByLocation_management('blocksLyr', 'INTERSECT', 'aoiLyr')          with arcpy.da.SearchCursor(fc, 'BlockNumber') as c:         for r in c:             ids.append(r[0])          print ids

Re: addin: bad selection from tool

Anonymous User — Mon, 23 Jun 2014 17:22:47 GMT

You are only going through the feature class with the search cursor, not the feature layer. You cannot have a selection on the feature class itself, but only a feature layer or table view.

with arcpy.da.SearchCursor(fc, 'BlockNumber') as c:         for r in c:             ids.append(r[0])

needs to be:

with arcpy.da.SearchCursor('blocksLyr', 'BlockNumber') as c:         for r in c:             ids.append(r[0])

Also, I would recommend setting up the feature layers differently and grab the output of the make feature layer tool:

block_lyr = arcpy.MakeFeatureLayer_management(fc, 'blocksLyr').getOutput(0) .... .... with arcpy.da.SearchCursor(block_lyr, 'BlockNumber') as c:         for r in c:             ids.append(r[0])

Re: addin: bad selection from tool

KevinBell — Mon, 23 Jun 2014 17:31:51 GMT

: \ Brain stall! Thanks Caleb!

Re: addin: bad selection from tool

Anonymous User — Mon, 23 Jun 2014 17:35:24 GMT

: \ Brain stall! Thanks Caleb!

Happens to me all the time!