topic Re: Count topology errors in Python in Geoprocessing Questions

Count topology errors in Python

Greg_Yetman — Wed, 22 Oct 2014 14:02:31 GMT

Hi,

Are there any hooks to get the count of errors in a topology via Arcpy? Using Describe only returns information about the Topology settings, not the number of errors, types, etc.

TIA,

Greg

Re: County topology errors in Python

Greg_Yetman — Wed, 22 Oct 2014 14:29:47 GMT

I figured this out: I converted all of the topologies to feature classes using ExportTopologyErrors_management() and then counted the resulting feature class features. Code is below. The topologies were generated by a script across File GDBS, so I'm relying on the naming convention to process them all.

import arcpy, os
from arcpy import env
outws = r'D:\temp\topocount.gdb'
env.workspace = r'D:\data'
fgdbs = arcpy.ListWorkspaces('*','FileGDB')
for fgdb in fgdbs:
    env.workspace = fgdb
    dataset = arcpy.ListDatasets('*','Feature')[0]
    topology = os.path.join(dataset, dataset + '_topology')
    topology = os.path.join(fgdb, topology)
    print 'Converting %s' %topology
    arcpy.ExportTopologyErrors_management(topology,outws,dataset + '_')

print 'Counting topology errors.'
# count 'em up
with open(r'D:\temp\topology_error_count.txt', 'w+') as f:
    env.workspace = outws
    fcs = arcpy.ListFeatureClasses()
    for fc in fcs:
        count = arcpy.GetCount_management(fc)
        print count
        outStr = fc + ',' + str(count) + '\n'
        f.writelines(outStr)

Re: Count topology errors in Python

RebeccaStrauch__GISP — Sun, 12 Dec 2021 03:49:32 GMT

Thanks for sharing that Greg. I had a slightly different need but this got me going in the right direction. I was needing to get a count to help verify the error count of a child replica (personal SDE) matched that of the parent (enterprise SDE), before marking them all as exceptions. I didn't need to write to a file, just print in the python window (for now), and in my case the _topology layer. I thought I'd share in case anyone else stumbles across this thread.

import arcpy
# sets temp output to scratchGDB
outGDB = arcpy.env.scratchGDB 
arcpy.env.overwriteOutput = True

topoBaseName = "jnu2w"   # basename for temp topo files.. 
topoFC = r'jnu2way.DBO.DWCMasters_topology'  # _topology feature class from ArcMap TOC
#topoFC = r"sde_wcgis_master.DBO.DWCMasters_topology"
arcpy.ExportTopologyErrors_management(topoFC, outGDB, topoBaseName)

errorCnt = 0
for fType in ["_line", "_point", "_poly"]:
     #print("fType {0}".format(fType))
     lyr = ("{0}{1}".format(topoBaseName, fType))
     #print("layer name {0}".format(lyr))
     fType = int(arcpy.GetCount_management(lyr).getOutput(0))
     print(" ->Layer {0}  Errors: {1}".format(lyr, fType))
     errorCnt = errorCnt + fType
     # cleanup - removes temp FC from scratch
     arcpy.Delete_management(lyr)

print("    Total topology errors for {0}: {1}".format(topoFC, errorCnt))
print("\n NOTICE: if {0} same as exceptions in parent, edit and mark all as exceptions".format(errorCnt, errorCnt))
‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

nothing fancy, but works for a quick count on a single _topology layer..