ArcMap

Field

サマリー

The field object represents a column in a table. A field has many properties, the most obvious ones being its name and its type.

説明

Field properties can be accessed through the ListFields and Describe functions.

Updating a field property only updates the field object, no changes are made to the actual field in the table or feature class.

構文

 Field  ()

プロパティ

プロパティ説明データ タイプ
aliasName
(読み書き)

The alias name of the field.

String
baseName
(読み書き)

The unqualified field name.

String
defaultValue
(読み書き)

The default value of the field.

Variant
domain
(読み書き)

The name of the associated domain.

String
editable
(読み書き)

The editable state: True if the field is editable.

Boolean
isNullable
(読み書き)

The nullable state: True if the field allows null values.

Boolean
length
(読み書き)

The field's length.

Integer
name
(読み書き)

The name of the field.

String
precision
(読み書き)

The precision of the field.

Integer
required
(読み書き)

The required state: True if the field must contain a value.

Boolean
scale
(読み書き)

The field's scale.

Integer
type
(読み書き)

The field type.

  • Blob —Blob
  • Date —Date
  • Double —Double
  • Geometry —Geometry
  • GlobalID —Global ID
  • Guid —Guid
  • Integer —Integer (Long Integer)
  • OID —Object ID
  • Raster —Raster
  • Single —Single (Float)
  • SmallInteger —Small Integer (Short Integer)
  • String —String (Text)

Learn more about ArcGIS field data types

String

コードのサンプル

Field example

Display field properties for the specified feature class.

import arcpy

feature_class = "c:/data/counties.shp"

# Create a list of fields using the ListFields function
fields = arcpy.ListFields(feature_class)

# Iterate through the list of fields
for field in fields:
    # Print field properties
    print("Field:       {0}".format(field.name))
    print("Alias:       {0}".format(field.aliasName))
    print("Type:        {0}".format(field.type))
    print("Is Editable: {0}".format(field.editable))
    print("Required:    {0}".format(field.required))
    print("Scale:       {0}".format(field.scale))
    print("Precision:   {0}".format(field.precision))

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