ListFields (arcpy)

摘要

列出指定数据集中的要素类、shapefile 或表中的字段。返回的列表可使用针对名称和字段类型的搜索条件进行限制，并将包含字段对象。

语法

ListFields (dataset, {wild_card}, {field_type})

参数	说明	数据类型
dataset	The specified feature class or table whose fields will be returned.	String
wild_card	通配符可限制返回的结果。如果未指定任何通配符，则会返回所有值。 (默认值为 None)	String
field_type	The specified field type to be returned. Valid field types are: All — All field types are returned. This is the default. BLOB —Only field types of BLOB are returned. Date —Only field types of Date are returned. Double —Only field types of Double are returned. Geometry —Only field types of Geometry are returned. GlobalID —Only field types of GlobalID are returned. GUID —Only field types of GUID are returned. Integer —Only field types of Integer are returned. OID —Only field types of OID are returned. Raster —Only field types of Raster are returned. Single —Only field types of Single are returned. SmallInteger —Only field types of SmallInteger are returned. String —Only field types of String are returned. (默认值为 All)	String

返回值

数据类型	说明
Field	返回包含字段对象的列表。

代码实例

ListFields 示例

列出字段属性。

import arcpy

# For each field in the Hospitals feature class, print 
#  the field name, type, and length.
fieldList = arcpy.ListFields("C:/Data/Municipal.gdb/Hospitals")

for field in fieldList:
    print("{0} is a type of {1} with a length of {2}"
          .format(field.name, field.type, field.length))

ListFields 示例 2

生成字段名称列表。

import arcpy

fclass = "C:/Data/Municipal.gdb/Hospitals"
fieldnames = [f.name for f in arcpy.ListFields(fclass)]