ListDatasets

Zusammenfassung

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.

Diskussion

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

Syntax

ListDatasets ({wild_card}, {feature_type})

Parameter	Erläuterung	Datentyp
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. (Der Standardwert ist All)	String

Rückgabewert

Datentyp	Erläuterung
String	A list containing dataset names returned from the function, limited by the wildcard and feature type arguments.

Codebeispiel

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)