Field

摘要

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

讨论

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.

语法

Field ()

属性

属性	说明	数据类型
aliasName （可读写）	The alias name of the field.	String
baseName （可读写）	The unqualified field name.	String
domain （可读写）	The name of the associated domain.	String
editable （可读写）	The editable state: True if the field is editable.	Boolean
isNullable （可读写）	The nullable state: True if the field allows null values.	Boolean
length （可读写）	The field's length.	Integer
name （可读写）	The name of the field.	String
precision （可读写）	The precision of the field.	Integer
required （可读写）	The required state: True if the field must contain a value.	Boolean
scale （可读写）	The field's scale.	Integer
type （可读写）	The field type: SmallInteger, Integer, Single, Double, String, Date, OID, Geometry, Blob.	String

代码示例

Field example

Display field properties for the specified feature class.

import arcpy

fc = "C:/Data/Counties.shp"

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

# 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))