ListDatasets

摘要

返回当前工作空间中的数据集的列表。 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。

说明

必须先设置工作空间环境，然后才能使用多个列表函数，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	限制返回的结果。如果未指定某一值，则返回所有值。通配符不区分大小写。 符号 说明 示例 * 表示零个或多个字符。 Te* 可找到田纳西州和德克萨斯州。	String
feature_type	The type of dataset that will be returned. Coverage—Coverages will be returned. Feature—Coverages or geodatabase datasets will be returned, depending on the workspace. GeometricNetwork—Geometric network datasets will be returned. LasDataset—LAS datasets will be returned. Mosaic—Mosaic datasets will be returned. Network—Network datasets will be returned. ParcelFabric—Parcel fabric datasets will be returned. ParcelFabricForArcmap—ArcMap parcel fabric datasets will be returned. Raster—Raster datasets will be returned. RasterCatalog—Raster catalog datasets will be returned. Terrain—Terrain datasets will be returned. Tin—TIN datasets will be returned. Topology—Topology datasets will be returned. TraceNetwork—Trace network datasets will be returned. UtilityNetwork—Utility network datasets will be returned. All—All datasets in the workspace will be returned. (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。

代码示例

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

# Print all the feature datasets in the workspace that start with the letters
# except c.
datasets2 = list(set(arcpy.ListDatasets("*", "Feature")) -
                 set(arcpy.ListDatasets("c*", "Feature")))
print(datasets2)

# Print all the feature datasets in the workspace that contain both the letter c
# and f.
datasets3 = list(set(arcpy.ListDatasets("*c*", "Feature")) &
                 set(arcpy.ListDatasets("*f*", "Feature")))
print(datasets3)

ListDatasets 示例 3

使用 feature_type 关键字参数列出追踪网络数据集。

import arcpy

arcpy.env.workspace = 'c:/data/myGDB.gdb/TN_dataset'

# Print all the trace networks in the workspace.
datasets = arcpy.ListDatasets(feature_type="tracenetwork")
for dataset in datasets:
    print(dataset)

ListDatasets 示例 4

使用位置参数列出地理数据库中的栅格数据集。

import arcpy

arcpy.env.workspace = 'c:/data/mySQLserver.sde'

# Print all the raster datasets in the workspace.
datasets = arcpy.ListDatasets("", "Raster")
for dataset in datasets:
    print(dataset)