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ArcPy List Datasets

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06-19-2016 07:21 PM
BrianEddy
New Contributor III

I'm an ArcPy neophyte/beginner - and this might be a stupid question, but I simply want to return a list of all the contents in a .gdb.  When I run the arcpy,listdatasets("*","Feature") function, it appears to work (no errors reported), but I do not 'see' anything.  I  used it with the 'print' function as well (using the example code provided in the help - copied below)  - but I still don't see anything.  Where does it go?  I only need to see it print to screen so I can copy/paste it....

B.

import arcpy  arcpy.env.workspace = "c:/data" 
# Print to the Interactive window all the feature datasets in the
# workspace that start with the letter

datasets = arcpy.ListDatasets("C*", "Feature") 
for dataset in datasets:

         print(dataset)

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15 Replies
DanPatterson_Retired
MVP Emeritus

Geo... what about toolbox and tool ? whats'up with that?

Dataset properties—Help | ArcGIS for Desktop

JoshuaBixby
MVP Esteemed Contributor

Ha, yeah, forgot about those.  The many lives of datasets; unfortunately, the meaning is context specific, and sometimes the context only seems to be in the developers' heads.

BrianEddy
New Contributor III

I guess my original question wasn't so stupid afterall.  It's been a long while since I dabbled in this kind of stuff - interesting to see some things haven't changed much when it comes to defining classes/objects in libraries like ArcPy/Python....I thought it would have been much cleaner by now

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BrianEddy
New Contributor III

Thanks again Dan.  I don't know how often I'll be here - I'm not really working with ArcPy/Python as much as I'd like, rather, only use it for scripting/batch processing when I have something large to run (usu. raster analyses/models).  Great to have this forum - and great to see you staying on top of it all for us!

JoshuaBixby
MVP Esteemed Contributor

If you are working on listing geographic data, I suggest using the ArcPy Data Access Walk function.  The ArcPy Walk function mimics the form and function of Python's os.walk function, the standard way of listing file system contents.  ArcPy Walk can even be coupled with ArcPy Describe to print the geodatabase contents and data type:

import os

gdb = #path to geodatabase
walk = arcpy.da.Walk(gdb)
for dirpath, dirnames, filenames in walk:
    if dirpath != gdb:
        desc = arcpy.Describe(dirpath)
        print "{:<30s}{}".format(os.path.relpath(dirpath, gdb), desc.datatype)
    for file in filenames:
        filepath = os.path.join(dirpath, file)
        desc = arcpy.Describe(filepath)
        print "{:<30s}{}".format(os.path.relpath(filepath, gdb), desc.datatype)
BrianEddy
New Contributor III

Thanks Joshua - this is extremely helpful!