Empty Feature class created?

CCWeedcontrol — Sat, 11 Dec 2021 10:04:38 GMT

I have a script here and seems simple enough but for some reason after the script is done it creates an empty feature class. I don't get any errors.. Am i missing something?

# Import arcpy module
import arcpy
import os
from arcpy import env
from datetime import datetime as d
startTime = d.now()

arcpy.env.workspace = "C:\GIS\weeds\Weeds.gdb"
arcpy.env.overwriteOutput = "True"
arcpy.env.qualifiedFieldNames = False

CITY = "C:\GIS\weeds\Weeds.gdb\City_Limits"

Taxparcels = "C:\GIS\weeds\Weeds.gdb\Parcels"
ADMIN = "C:\GIS\weeds\Weeds.gdb\ADMIN"
temp = "C:\GIS\weeds\Weeds.gdb"

# Process: Make Feature Layer
arcpy.MakeFeatureLayer_management(Taxparcels, "In_memory\Par")

# Process: Analysis Erase
arcpy.Erase_analysis("In_memory\Par", CITY, "In_memory\Par_ERASE","")

arcpy.MakeFeatureLayer_management("In_memory\Par_ERASE", "In_memory\Par1")

# Process: Add Join
try:
    arcpy.AddJoin_management("In_memory\Par1", "ACCOUNT", ADMIN, "Acct", "KEEP_ALL")
except BaseException as e:
    pass
#arcpy.FeatureClassToFeatureClass_conversion("In_memory\Par1", temp, "TaxWeed1")#working
arcpy.MakeFeatureLayer_management("In_memory\Par1", "In_memory\Par2")

# Process: Select Layer By Attribute
arcpy.SelectLayerByAttribute_management("In_memory\Par2", "NEW_SELECTION", "\"TEXT\" = 'common area'")

# Process: Delete Features
if int(arcpy.GetCount_management("In_memory\Par2").getOutput(0)) > 0:
    arcpy.DeleteFeatures_management("In_memory\Par2")

    
# Process: Make Feature Layer (2)
TaxPar2 = "weedtax"
arcpy.MakeFeatureLayer_management("In_memory\Par2", TaxPar2)

arcpy.FeatureClassToFeatureClass_conversion(TaxPar2, temp, "TaxWeed")
arcpy.Delete_management("In_memory\Par")
arcpy.Delete_management("In_memory\Par1")
arcpy.Delete_management("In_memory\Par2")
arcpy.Delete_management("In_memory\Par_ERASE")
#arcpy.Delete_management("In_memory\ParCel")

try:
    print '(Elapsed time: ' + str(d.now() - startTime)[:-3] + ')'

except Exception, e:
    # If an error occurred, print line number and error message
    import traceback, sys
    tb = sys.exc_info()[2]
    print "Line %i" % tb.tb_lineno
    print e.message

Re: Empty Feature class created?

JoshuaBixby — Thu, 20 Aug 2015 21:12:44 GMT

My guess, line #39 is deleting all of the features, so line #46 is copying an empty feature class to make a new, empty feature class. When using the Select Layer By Attribute tool, be careful because all records are returned if no records meet the criteria.

Re: Empty Feature class created?

CCWeedcontrol — Thu, 20 Aug 2015 21:32:03 GMT

ok, so if no records are found in line 35, then at 39 it's selecting all records because nothing was found. So how can i by pass line 35 in case nothing is found?

Re: Empty Feature class created?

JoshuaBixby — Fri, 21 Aug 2015 18:35:48 GMT

Although a bit kludgy, you can run a Get Count before the selection and store that number. Then, after the selection, you can compare the new Get Count with the old one. If they are the same, nothing was selected.

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Empty Feature class created?

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Re: Empty Feature class created?