Arcpy Feature Class Listing – Multiple Geodatabases in Multiple Folders

arcgis-10.1arcpyesri-geodatabase

I'm new in python scripting and try to list polyline feature classes of multiple Geodatabases. The Geodatabases are in many nested folders.For example in folder "A" I have 20 folders and in each folder i have 3 geadatabases. the question is that how can i list the feature classes of the geodatabases using Arcpy. I know simple Python codes to list feature classes in a folder such as :

import arcpy
from arcpy import env
env.workspace = ".././Data/6"
fclist = arcpy.ListFeatureClasses()
print fclist

I surf in this site and found a Q&A about How to list feature classes in multiple Geodatabases in a folder? . It was very useful but only for multi Geodatabases not multi folders.

Best Answer

The arcpy.da.Walk function from ArcGIS 10.1 SP1 allows you to do this. The following script walks through a workspace, create a list of every polyline, and copies the polylines to an output workspace. 

import arcpy
import os

in_workspace = r"C:\your\path"
out_workspace = r"C:\your\path2\temp.gdb\fds"

feature_classes = []
for dirpath, dirnames, filenames in arcpy.da.Walk(in_workspace, datatype="FeatureClass",type="Polyline"):
    for filename in filenames:
        feature_classes.append(os.path.join(dirpath, filename))

print feature_classes

# Loop through the "feature_classes" list and copy featureclasses to out_workspace
for fc in feature_classes:
    name = os.path.basename(fc) # Extract only the FC basename 
    arcpy.CopyFeatures_management(fc, os.path.join(out_workspace, name))
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