topic Re: Path Names in Python Questions

Path Names

BrettAuger1 — Tue, 17 Jun 2014 17:25:45 GMT

Hi folks,

I need to get a list of path names for feature classes in a gdb. The gdb is configured something like this:

Myfeatures.gdb
Feature 1 Dataset
[INDENT]fc1, fc2,fc3 [/INDENT]
Feature 2 Dataset
[INDENT]fc1, fc2,fc3 [/INDENT]
Feature 3 Dataset
[INDENT]fc1, fc2,fc3 [/INDENT]

etc.

I am having trouble getting right down to the FC for a path. I tried using the os.path.join function but it doesn't seem to like lists and an input.

This is what I have so far for code.

import arcpy import os # Set the current workspace   gdbInput = "Q:\PIR\GIS\Brett\GDB Import Tool\Test Data\PIR_MR98copy.gdb" gdbOutput = "Q:\PIR\GIS\Brett\GDB Import Tool\Test Data\EmptyGisDeliverables_v14.gdb"  arcpy.env.workspace = gdbInput  # Create list of datasets in input gdb dsInput = arcpy.ListDatasets() #print dsInput  #Create list of fc in ds for ds in dsInput:     fcInput = arcpy.ListFeatureClasses(feature_dataset=ds)     print fcInput

This is what I get for results from previous code:

[u'AppraisalPoint'] [u'BlockHubs', u'BlockPolygon'] [u'RoadLine', u'RoadCrossing', u'RoadNotes', u'RoadHubs'] [u'RiparianLine', u'Riparian_SMZ_Buffer', u'LakeWetland', u'LakeWetlandLine']

Thanks.

Brett

Re: Path Names

IanMurray — Sat, 11 Dec 2021 20:27:51 GMT

Really, you just need to iterate through each feature class, and concatenate the workspace, the feature dataset and feature class name together.


import arcpy
import os
# Set the current workspace


gdbInput = "C:\Users\iamurray\Desktop\Test.gdb"
gdbOutput = "Q:\PIR\GIS\Brett\GDB Import Tool\Test Data\EmptyGisDeliverables_v14.gdb"

arcpy.env.workspace = gdbInput

# Create list of datasets in input gdb
dsInput = arcpy.ListDatasets()
#print dsInput

#Create list of fc in ds
for ds in dsInput:
    fcInput = arcpy.ListFeatureClasses(feature_dataset=ds)
    for fc in fcInput:
    
        print gdbInput + "/" + ds + "/" + fc

This gives me

C:\Users\iamurray\Desktop\Test.gdb/Test1/TestFC2
C:\Users\iamurray\Desktop\Test.gdb/Test/TestFC

Re: Path Names

BrettAuger1 — Sat, 11 Dec 2021 20:27:54 GMT

Really, you just need to iterate through each feature class, and concatenate the workspace, the feature dataset and feature class name together.
import arcpy
import os
# Set the current workspace


gdbInput = "C:\Users\iamurray\Desktop\Test.gdb"
gdbOutput = "Q:\PIR\GIS\Brett\GDB Import Tool\Test Data\EmptyGisDeliverables_v14.gdb"

arcpy.env.workspace = gdbInput

# Create list of datasets in input gdb
dsInput = arcpy.ListDatasets()
#print dsInput

#Create list of fc in ds
for ds in dsInput:
    fcInput = arcpy.ListFeatureClasses(feature_dataset=ds)
    for fc in fcInput:
    
        print gdbInput + "/" + ds + "/" + fc
This gives me

C:\Users\iamurray\Desktop\Test.gdb/Test1/TestFC2
C:\Users\iamurray\Desktop\Test.gdb/Test/TestFC

This seems to work for me too. However when I use a variable to collect the path names and use that variable as an input it only uses the last value. Is there a step that I need to do so the path names are returned in a list that can be used as an input for the next step. This is what I have so far again:

import arcpy
import os
# Set the current workspace


gdbInput = "Q:\PIR\GIS\Brett\GDB Import Tool\Test Data\PIR_MR98copy.gdb"
gdbOutput = "Q:\PIR\GIS\Brett\GDB Import Tool\Test Data\EmptyGisDeliverables_v14.gdb"

arcpy.env.workspace = gdbInput

# Create list of datasets in input gdb
dsInput = arcpy.ListDatasets()
#print dsInput

#Create list of fc in ds
for ds in dsInput:
    fcInput = arcpy.ListFeatureClasses(feature_dataset=ds)
    for fc in fcInput:
        list = [gdbOutput+ "/" + ds + "/" + fc]
        print list

arcpy.env.workspace = gdbOutput
for path in list:
    if not arcpy.Exists(path):
        print "no {}".format(path)
    else:
        print "yes {}".format(path)

Thank you for your help.

Brett

Re: Path Names

IanMurray — Tue, 17 Jun 2014 19:21:06 GMT

Easiest thing to do would to create an empty list outside of your loop, then have each file path append itself to the list.

 import arcpy import os # Set the current workspace   gdbInput = "Q:\PIR\GIS\Brett\GDB Import Tool\Test Data\PIR_MR98copy.gdb" gdbOutput = "Q:\PIR\GIS\Brett\GDB Import Tool\Test Data\EmptyGisDeliverables_v14.gdb"  arcpy.env.workspace = gdbInput  # Create list of datasets in input gdb dsInput = arcpy.ListDatasets() #print dsInput  #make empty list to append file paths to. fclist = []  #Create list of fc in ds for ds in dsInput:     fcInput = arcpy.ListFeatureClasses(feature_dataset=ds)     for fc in fcInput:         filepath = [gdbOutput+ "/" + ds + "/" + fc]         fclist.append(filepath)  arcpy.env.workspace = gdbOutput for path in fclist:     if not arcpy.Exists(path):         print "no {}".format(path)     else:         print "yes {}".format(path)

Re: Path Names

BrettAuger1 — Sat, 11 Dec 2021 20:27:56 GMT

This works smashingly. Thank you for your help. It is much appreciated.

Easiest thing to do would to create an empty list outside of your loop, then have each file path append itself to the list.


import arcpy
import os
# Set the current workspace


gdbInput = "Q:\PIR\GIS\Brett\GDB Import Tool\Test Data\PIR_MR98copy.gdb"
gdbOutput = "Q:\PIR\GIS\Brett\GDB Import Tool\Test Data\EmptyGisDeliverables_v14.gdb"

arcpy.env.workspace = gdbInput

# Create list of datasets in input gdb
dsInput = arcpy.ListDatasets()
#print dsInput

#make empty list to append file paths to.
fclist = []

#Create list of fc in ds
for ds in dsInput:
    fcInput = arcpy.ListFeatureClasses(feature_dataset=ds)
    for fc in fcInput:
        filepath = [gdbOutput+ "/" + ds + "/" + fc]
        fclist.append(filepath)

arcpy.env.workspace = gdbOutput
for path in fclist:
    if not arcpy.Exists(path):
        print "no {}".format(path)
    else:
        print "yes {}".format(path)

Re: Path Names

IanMurray — Tue, 17 Jun 2014 19:37:40 GMT

Glad it worked for you!