I have a gdb with around 200 feature classes (waterlines). I working on a tool that will add the featureclass desired base on an ID number. the featureclasses are named "WATERLINE_<ID NUMBER>_<NAME>". Example: WATERLINE_123_SPRINGFIELD. Since the only parameter is entered as a 3 digit ID number (string) I use a wildcard query with arcpy.ListFeatureClasses then use arcpy.Exists to add it to the map. Some systems don't have waterline data. This approach isn't working. If I hardcode the featureclass name into arcpy.Exists it works. Any ideas are appreciated.
# Import modules
import arcpy
# Set overwrite option
from arcpy import env
env.overwriteOutput = True
# Variables
pws = arcpy.GetParameterAsText(0)
waterlines = "WATERLINE_" + pws + "_*"
wl_layer = "Waterlines " + pws
wl_symb = r"G:\Source Water Protection\PWS_ID_Tool\WATERLINES.lyr"
# Add waterlines
env.workspace = r"G:\WATER_FACILITY\WATERLINES.gdb"
wlFclass = arcpy.ListFeatureClasses(waterlines)
arcpy.AddMessage(wlFclass) # Print/message statement for results dialog box. Confirms wlFclass is there.
if arcpy.Exists(wlFclass): # This where it fails.
arcpy.AddMessage("Waterline data exist for this PWS.")
arcpy.MakeFeatureLayer_management(waterlines, wl_layer)
arcpy.ApplySymbologyFromLayer_management(wl_layer, wl_symb)
newLayer = arcpy.mapping.Layer(wl_layer)
arcpy.mapping.AddLayer(df, newLayer, "TOP")
else:
arcpy.AddWarning("No waterline data exist for this PWS.")Tool results dialog box:
Executing: waterlinestest 465
Start Time: Wed Sep 09 10:36:53 2015
Running script waterlinestest...
[u'WATERLINE_123_SPRINGFIELD']
No waterline data exist for this PWS.
Completed script waterlinestest...
Succeeded at Wed Sep 09 10:37:27 2015 (Elapsed Time: 33.95 seconds)
5 (Elapsed Time: 33.95 seconds)
