サマリー
A value table is a flexible object that can be used as input for a multivalue parameter. It exists only during the lifetime of the geoprocessing object that created it.
説明
setRow's value argument is space delimited. Any value used in the value argument that contains spaces must be enclosed in quotations. In the following example, a value table with two columns has a feature class and an index value added:
value_table.setRow(0, "'c:/temp/land use.shp' 2")構文
ValueTable ({columns})| パラメーター | 説明 | データ タイプ |
columns | The number of columns. (デフォルト値は次のとおりです 1) | Integer |
プロパティ
| プロパティ | 説明 | データ タイプ |
| columnCount (読み取り専用) | The number of columns. | Integer |
| rowCount (読み取り専用) | The number of rows. | Integer |
方法の概要
| 方法 | 説明 |
| addRow (value) | Adds a row to the value table. |
| exportToString () | Exports the object to its string representation. |
| getRow (row) | Returns a row from the ValueTable. |
| getTrueValue (row, column) | Returns the value from a given column and row. |
| getValue (row, column) | Returns the value from a given column and row. |
| loadFromString (string) | Restore or update the spatial reference object using a WKT string. The exportToString method can be used to export a WKT string representation of the spatial reference.
|
| removeRow (row) | Deletes a row from the ValueTable object. |
| setColumns (number_of_columns) | Sets the number of columns for the value table. |
| setRow (row, value) | Updates a given row within the ValueTable object. The value argument is space-delimited. Any value used in the value argument that contains spaces must be enclosed in quotations. In the following example, a ValueTable object with two columns has a feature class and an index value added: |
| setValue (row, column, value) | Updates the value of a given row and column. |
方法
addRow (value)
| パラメーター | 説明 | データ タイプ |
value | The row to be added. The value argument is space-delimited. Any value used that contains spaces must be enclosed in quotations. In the following example, a value table with two columns has a feature class and an index value added: | Object |
exportToString ()
| データ タイプ | 説明 |
| String | The WKT string representation of the object. |
getRow (row)
| パラメーター | 説明 | データ タイプ |
row | The row index position. | Integer |
| データ タイプ | 説明 |
| String | A row from the ValueTable object. |
getTrueValue (row, column)
| パラメーター | 説明 | データ タイプ |
row | The row index position. | Integer |
column | The column index position. | Integer |
| データ タイプ | 説明 |
| String | The value of a given column and row. |
getValue (row, column)
| パラメーター | 説明 | データ タイプ |
row | The row index position. | Integer |
column | The column index position. | Integer |
| データ タイプ | 説明 |
| String | The value of a given column and row. |
loadFromString (string)
| パラメーター | 説明 | データ タイプ |
string | The WKT string representation of the object. | String |
removeRow (row)
| パラメーター | 説明 | データ タイプ |
row | The index position of the row to remove. | Integer |
setColumns (number_of_columns)
| パラメーター | 説明 | データ タイプ |
number_of_columns | The number of columns for the value table. | Integer |
setRow (row, value)
| パラメーター | 説明 | データ タイプ |
row | The index position of the row to update. | Integer |
value | The value to update in the given row. | Object |
setValue (row, column, value)
| パラメーター | 説明 | データ タイプ |
row | The row index. | Integer |
column | The column index | Integer |
value | The value to update the given row and column. | Object |
コードのサンプル
Use ValueTable to hold feature class names and ranks for the Union tool.
import arcpy
# Set the workspace. List all of the feature classes in the dataset
arcpy.env.workspace = "c:/data/landbase.gdb/Wetlands"
feature_classes = arcpy.ListFeatureClasses()
# Create the value table for the Analysis Union tool with 2 columns
value_table = arcpy.ValueTable(2)
# Iterate through the list of feature classes
for fc in feature_classes:
# Update the value table with a rank of 2 for each record, except
# for BigBog
if fc.lower() != "bigbog":
value_table.addRow(fc + " 2")
else:
value_table.addRow(fc + " 1")
# Union the wetlands feature classes with the land use feature class to create
# a single feature class with all of the wetlands and land use data
value_table.addRow("c:/data/landbase.gdb/land_use 2")
arcpy.Union_analysis(value_table, "c:/data/landbase.gdb/wetlands_use")A value table can be populated with a multivalue string that has been passed to a script as an argument, making it easy to extract each record. The example below shows how to do this:
import os
import arcpy
# Set the output workspace
arcpy.env.workspace = arcpy.GetParameterAsText(1)
# Create a value table with 2 columns
value_table = arcpy.ValueTable(2)
# Set the values of the table with the contents of the first argument
value_table.loadFromString(arcpy.GetParameterAsText(0))
# Loop through the list of inputs
for i in range(0, value_table.rowCount):
# Validate the output name for the new workspace
name = value_table.getRow(i)
out_name = arcpy.ValidateTableName(os.path.basename(name))
# Copy the features to the new workspace
arcpy.CopyFeatures_management(name, out_name)