I'm trying to assign a value to the attributes of each feature of a feature layer. To do so I am just iterating through each row using 'arcpy.da.SearchCursor'.
#Import geoprocessing. import arcpy #Import workspace. arcpy.env.workspace = r'D:\ArcGIS_Pro_Projects\Optimity_Alf' #Input parameters buffer_distance = arcpy.GetParameterAsText(0) #Input variables. fc_Opt_All = r'D:\ArcGIS_Pro_Projects\Optimity_Alf\Optimity_Equipment.gdb\Optimity_All' fc_Opt_Opp = r'D:\ArcGIS_Pro_Projects\Optimity_Alf\Optimity_Equipment.gdb\Optimity_Prospect' fc_London_Bldngs = r'D:\ArcGIS_Pro_Projects\Optimity_Alf\London_Building.gdb\London_Buildings_Multipatch' DSM_model = r'D:\Data4Optimimty\ESRI_UK_Bluesky_DSM\ESRI_UK_Bluesky_DSM.gdb\DSM_25cm_2015' arcpy.MakeFeatureLayer_management(fc_Opt_Opp, 'fl_Opt_Opp') field_names = ['LOCATION', 'ESTATE', 'ADDRESS', 'OFFSETA', 'OFFSETB', 'Z', 'OFFSETC', 'AZIMUTH1', 'AZIMUTH2', 'VERT1', 'VERT2', 'RADIUS1', 'RADIUS2', 'STATUS', 'CONNECTION'] observers =  targets =  #Calculating LOS for each point with arcpy.da.SearchCursor(fc_Opt_Opp,field_names) as cursor: for row in cursor: #Adding default values to observers' attributes row = 'Prospect' row = 1 row = 0 arcpy.AddSurfaceInformation_3d('fl_Opt_Opp', DSM_model, 'Z', 'BILINEAR') row = row + row row = 0 row = 360 row = 1 row = -16 row = 0 row = 2000 cursor.updateRow(row)
However, I am getting the following error:
Traceback (most recent call last): File "D:\ArcGIS_Pro_Projects\Optimity_Alf\Arcpy_Scripts\LOS_Many_Points.py", line 28, in <module> row = 'Prospect' TypeError: 'tuple' object does not support item assignment Failed to execute (LOSManyPoints).
I really can't see what tuple is the error referring to. Besides, if I do the same thing but for just one feature (not iterating) I do not get the error and it works fine.