ArcGIS python field 字段

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

討論
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.

語法
Field ()
屬性
屬性 說明 數據類型 
aliasName
（可讀寫） The alias name of the field. 
 String 
baseName
（可讀寫） The unqualified field name.
 String 
domain
（可讀寫） The name of the associated domain.
 String 
editable
（可讀寫） The editable state: True if the field is editable.
 Boolean 
isNullable
（可讀寫） The nullable state: True if the field allows null values.
 Boolean 
length
（可讀寫） The field's length.
 Integer 
name
（可讀寫） The name of the field.
 String 
precision
（可讀寫） The precision of the field. 
 Integer 
required
（可讀寫） The required state: True if the field must contain a value.
 Boolean 
scale
（可讀寫） The field's scale.
 Integer 
type
（可讀寫） The field type: SmallInteger, Integer, Single, Double, String, Date, OID, Geometry, Blob.
 String 

代碼示例
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))