ListDatasets (arcpy)

摘要

列出工作空间中的所有数据集。可针对数据集名称和数据集类型指定搜索条件，从而限制返回的列表。

讨论

必须先设置工作空间环境，之后才能使用多个列表函数，这些列表函数包括 ListDatasets、ListFeatureClasses、ListFiles、ListRasters、ListTables 和 ListWorkspaces。

语法

ListDatasets ({wild_card}, {feature_type})

参数	说明	数据类型
wild_card	wild_card 可限制返回的结果。如果未指定任何 wild_card，则会返回所有值。	String
feature_type	The feature type to limit the results returned by the wildcard argument. Valid dataset types are: 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. (默认值为 All)	String

返回值

数据类型	说明
String	该函数返回包含数据集名称的列表，该列表受通配符和要素类型参数限制。

代码实例

ListDatasets 示例

列出以 C 开头的要素数据集名称。

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 示例 2

列出以 c 或 f 开头、以 c 以外的其他字母开头或同时包含 c 和 f 的要素数据集名称。

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)