ListDatasets

Résumé

Returns a list of datasets in the current workspace. Search conditions can be specified for the dataset name and dataset type to limit the list that is returned.

Discussion

The workspace environment must be set before using several of the list functions, including ListDatasets, ListFeatureClasses, ListFiles, ListRasters, ListTables, and ListWorkspaces.

Syntaxe

ListDatasets ({wild_card}, {feature_type})

Paramètre	Explication	Type de données
wild_card	Limits the results returned. If a value is not specified, all values are returned. The wildcard is not case sensitive. Symbol Description Example * Represents zero or more characters. Te* finds Tennessee and Texas.	String
feature_type	The dataset type that will limit the results returned by the wild_card argument. The following are valid dataset types: Coverage —Only coverages. Feature —Coverage or geodatabase dataset, depending on the workspace. GeometricNetwork —Only geometric network datasets. Mosaic —Only mosaic datasets. Network —Only network datasets. ParcelFabric —Only parcel fabric datasets. Raster —Only raster datasets. RasterCatalog —Only raster catalog datasets. Schematic —Only schematic datasets. Terrain —Only terrain datasets. Tin —Only TIN datasets. Topology —Only topology datasets. All —All datasets in the workspace. This is the default value. (La valeur par défaut est All)	String

Valeur renvoyée

Type de données	Explication
String	A list containing dataset names returned from the function, limited by the wildcard and feature type arguments.

Exemple de code

ListDatasets example

List feature dataset names that start with C.

import arcpy

arcpy.env.workspace = "c:/data"

# Print to the Interactive window all the feature datasets in the
#   workspace that start with the letter C.
datasets = arcpy.ListDatasets("C*", "Feature")

for dataset in datasets:
    print(dataset)

ListDatasets example 2

List feature dataset names that start with c or f, start with letters except c, or contain both c and f.

import arcpy
arcpy.env.workspace = 'c:/data'

# Print to the interactive window all the feature datasets in the
#   workspaces that start with the letter c or f.
datasets1 = list(set(arcpy.ListDatasets("c*", "Feature")) |
                 set(arcpy.ListDatasets("f*", "Feature")))
print(datasets1)

#   workspaces that start with the letters except c
datasets2 = list(set(arcpy.ListDatasets("*", "Feature")) -
                 set(arcpy.ListDatasets("c*", "Feature")))
print(datasets2)

#   workspaces that contain both the letter c and f
datasets3 = list(set(arcpy.ListDatasets("*c*", "Feature")) &
                 set(arcpy.ListDatasets("*f*", "Feature")))
print(datasets3)