topic Re: Arcpy.da.Walk(workspace, datatype = "FeatureDataset") in Python Questions

Arcpy.da.Walk(workspace, datatype = "FeatureDataset")

PeterWilson — Tue, 26 Aug 2014 01:39:19 GMT

I'm currently building a python script that will iterate through Feature Datasets within a File Geodatabase. I then want to create a new set of Feature Datasets based on the current Feature Datasets but with a different spatial reference. I want to select the Feature Classes within the original Feature Dataset and project and save them into the newly created Feature Datasets.

I want to use arcpy.da.walk to firstly get a list of the Feature Datasets in order to create the new Feature Datasets, but for some unknown reason even if I set the datatype to "FeatureDataset" nothing is returned. Any assistance to resolve the following will truly be appreciated.

Also if someone can guide me in how to only retrieve the Feature Classes in the Feature Dataset and not directly within the File Geodatabase and how then to save the the reprojected Feature Classes into the newly generated Feature Datasets.

'''
Created on Aug 25, 2014


@author: PeterW
'''


# Import system modules
import arcpy
import os


# Set current workspace
workspace = r'E:\Projects\Projects14\H103342\test2.gdb'
arcpy.env.workspace = workspace


# Set environment settings
arcpy.env.overwriteOutput = True


# Create list of Feature Classes in each Feature Dataset
fcs = []


# Iterate through each Feature Dataset within the File Geodatabase
for dirpath, dirnames, filenames in arcpy.da.Walk(workspace, datatype = "FeatureDataset"):
    for filename in filenames:
        print filename

Regards

Re: Arcpy.da.Walk(workspace, datatype = "FeatureDataset")

RiyasDeen — Tue, 26 Aug 2014 03:08:36 GMT

Hi Peter,

replace your lines 29 and 30 with below. Since you have set datatype as FeatureDataset, filenames will be an empty list.

for dir in dirnames:

featureDataSet = os.path.join(dirpath, dir)

print featureDataSet

Re: Arcpy.da.Walk(workspace, datatype = "FeatureDataset")

MatthewLewis — Sun, 12 Dec 2021 01:33:04 GMT

If you want a more function based approach


import arcpy








# List through Datasets in workspace.


def ListDatasets(workspace):








    arcpy.env.workspace = workspace


    datasetList = arcpy.ListDatasets("*", "Feature")


    arraylist = []








    for dataset in datasetList:


        print "Dataset:" + dataset


        ##get path


        desc = arcpy.Describe(dataset)


        ## append to list


        print "Dataset Path: " + arrayitem


        arraylist.append(desc.catalogPath)








    return arraylist





workspace = r"C:\Users\lew60590\Documents\ArcGIS\Default.gdb"


arraylist = ListDatasets(workspace)








# List through datasets and print Features


for arrayitem in arraylist:


    arcpy.env.workspace = arrayitem


    


    fclist = arcpy.ListFeatureClasses()


    for fc in fclist:
        print "Feature:" + fc

Re: Arcpy.da.Walk(workspace, datatype = "FeatureDataset")

JamesCrandall — Sun, 12 Dec 2021 01:33:07 GMT

This will list all of the feature classes. Puts any FeatureDataset name first, then FC name:

FDatasetName\FeatureClassName


def listFcsInGDB(gdb):
    ''' list all Feature Classes in a geodatabase, including inside Feature Datasets '''
    arcpy.env.workspace = gdb
    print 'Processing ', arcpy.env.workspace


    fcs = []
    for fds in arcpy.ListDatasets('','feature') + ['']:
        for fc in arcpy.ListFeatureClasses('','',fds):
            fcs.append(os.path.join(fds, fc))
    return fcs





gdb = r'H:\Documents\ArcGIS\Default.gdb'
fcs = listFcsInGDB(gdb)
for fc in fcs:
    print fc