Add a field to multiple feature classes

Question

I am trying to add a field to a specific number of feature classes, the names of the feature classes are Pumpcapacities_1, Pump capacities_2, Pump capacities_3.

Each one of these feature classes are located in the same geodatabase, my idea was to use arcpy.ListFeatureClasses("Pump*","Point") in order to select only the feature classes that start with Pump. But it's not working, each one of those feature classes are in a different feature dataset.

[![enter image description here][1]][1]

import arcpy
arcpy.env.workspace = r"C:\Users\mviera\Documents\CWADigitizeSchemaWorking.gdb"
Feature = arcpy.ListFeatureClasses("Pump*","Point")
for dataset in Feature
    arcpy.AddField_management(dataset, "INDPumpCapacity","TEXT",50,"","","IND Pump Capacity","NULLABLE","NON_REQUIRED")
    print dataset 

Answer 1

Instead of using arcpy.ListFeatureClasses, since you already know the feature classes which you want to add a field to, you can just create a list which stores their names and iterate through the list:

import arcpy
arcpy.env.workspace = "C:\\Users\\mviera\\Documents\\CWADigitizeSchemaWorking.gdb"
FcList = ["Pumpcapacities_1", 
          "Pump capacities_2", 
          "Pump capacities_3"]
for fc in FcList:
    arcpy.management.AddField(fc,"INDPumpCapacity","TEXT",50,"","","IND Pump Capacity", "NULLABLE", "NON_REQUIRED")
    print fc

Answer 2

You need to loop through your Feature Datasets first.

import arcpy
arcpy.env.workspace = r"C:\Users\mviera\Documents\CWADigitizeSchemaWorking.gdb"

datasets = arcpy.ListDatasets(feature_type = 'Feature')
datasets = [''] + datasets if datasets is not None else []

for ds in datasets:
    Feature = arcpy.ListFeatureClasses("Pump*", "Point", ds)
    for fc in Feature:
        arcpy.AddField_management(fc, "INDPumpCapacity", "TEXT", 50, "", "", "IND Pump Capacity")
        print fc

This was based on the code sample at the bottom of ListFeatureClasses - ArcGIS Desktop help