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Python Glob.Glob

Vdawg1990

Hi,

Can someone please shed some light on why my glob.glob statement is not working?

It works on shapefiles just not feature classes in geodatabases.

I am simply just trying to put in a file path to a feature class in the geodatabase. The file path however needs to include a wild card (*) as the date/name of the folder can change each month.

I have tried the below statement but i get the error below

TC = glob.glob("L:/Support/Data_load/Tenements/%s/SA/Kennels/Popcorns*/Popcorn.gdb/Popcorn123" % (d))[0] 

IndexError: list index out of range

Does glob.glob not support geodatabase? and if so is there another solution?

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Accepted answers

danretired

A wildcard used in my examples returns a list of featureclasses like glob.glob.

If you are using the first one, then you would slice as per usual ( [0] ). If there was only one, then you still slice the list.

Or you have a list to cycle through if you are working with many featureclasses.

If you examined the contents of a *.gdb "folder", you will see there is no usable naming convention except through the ListFeatureClasses approach

All comments

Vdawg1990

Hi Dan,

Ah understood!

Yes in my case there is only one. I have tried the index and it works like a charm 🙂 Thank you

D1 = arcpy.AddField_management(b_fcs[0], "test999", "DATE", "", "", "", "", "NULLABLE", "NON_REQUIRED", "")

danretired

A wildcard used in my examples returns a list of featureclasses like glob.glob.

If you are using the first one, then you would slice as per usual ( [0] ). If there was only one, then you still slice the list.

Or you have a list to cycle through if you are working with many featureclasses.

If you examined the contents of a *.gdb "folder", you will see there is no usable naming convention except through the ListFeatureClasses approach

Vdawg1990

Hi Dan,

Thank you for your response.

How do i use the feature class from the list as a variable though?

i.e How would i use the featureclass 'big' as variable that i can put in other commands? (Like arcpy.addfield)

Also i apologise i was not clear, the wild card is not in the featureclass name but in the folder name. (what you have written is still beneficial as at some stage i will need wild cards for my feature classes)

TC = glob.glob("L:/Support/Data_load/Tenements/%s/SA/Kennels/Popcorns*/Popcorn.gdb" % (d))[0]

I am wanting to use my feature class as a variable that i can use in addfield and other commands, but the wildcard in the folder path is causing errors"

D1 = arcpy.AddField_management(Popcorn123, "Ext_Date", "DATE", "", "", "", "", "NULLABLE", "NON_REQUIRED", "")

danretired

List all featureclasses in a gdb.

Then list only those that begin with a "b"

import arcpy
gdb = r"C:\arcpro_npg\npg\Project_npg\tests.gdb"
arcpy.env.workspace = gdb
fcs = arcpy.ListFeatureClasses("*")

fcs = arcpy.ListFeatureClasses("b*")

fcs = arcpy.ListFeatureClasses("*")

b_fcs = arcpy.ListFeatureClasses("b*")

fcs
['big', 'odd', 'odd_inters', 'odd_dis', 'odd_sub', 'odd5', 'odd5_centr', 'odd5_inside', 'odd_vert', 'sq', 'sq_v', 'Voronoi', 'Voronoi2', 'x2', 'multi', 'sq2', 'shps', 'v0', 'c', 'sq2_mabr', 'sq2_delaunay', 'c_pnts', 'sq_MeshPnts', 'sq2_vert', 'c_ln', 'c_segs', 'concave_c', 'c_dens', 'sq_diss', 'hex_flat', 'rectangles', 'triangles', 'hex_shift', 'dissolve', 'dissolve1', 'aoi', 'rot', 'CC', 'c0', 'c1', 'CCply', 'c0ply', 'b0b1', 'b0_b1', 'b0_b1_ints', 'b0', 'b0_ints']

b_fcs
['big', 'b0b1', 'b0_b1', 'b0_b1_ints', 'b0', 'b0_ints']

BTW

glob.glob wouldn't be able to decipher any useful filenames and/or extensions. Examine the contents of a *.gdb using windows File Explorer and you will see what I mean

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