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.
| String | ||||||
feature_type | The dataset type that will limit the results returned by the wild_card argument. The following are valid dataset types:
(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)