FieldInfo (arcpy)

摘要

为图层和表视图提供字段信息方法和属性。

语法

FieldInfo ()

属性

属性	说明	数据类型
count (只读)	The field count.	Integer

方法概述

方法	说明
addField (field_name, new_field_name, visible, split_rule)	添加字段条目信息
exportToString ()	Exports the object to its string representation.
findFieldByName (field_name)	Finds the field index by field name
findFieldByNewName (field_name)	Finds the field index by new field name.
getFieldName (index)	Gets the field name from the table by index position.
getNewName (index)	Gets the new field name from the table by index position.
getSplitRule (index)	Gets the split rule from the table by index position.
getVisible (index)	Gets the visible flag from the table by index position.
loadFromString (string)	Restore the object using its string representation. The exportToString method can be used to create a string representation.
removeField (index)	Removes the field info entry from a table.
setFieldName (index, field_name)	Sets the field name into the table.
setNewName (index, new_field_name)	Sets the new field name into the table.
setSplitRule (index, rule)	Sets the split rule into the table.
setVisible (index, visible)	Set the visible flag of a field on the table.

方法

addField (field_name, new_field_name, visible, split_rule)

参数	说明	数据类型
field_name	The field name from the input feature class or table.	String
new_field_name	Sets the field name for the new layer or table view.	String
visible	Sets whether the field is visible or hidden. VISIBLE —Field is visible. HIDDEN —Field is hidden.	String
split_rule	Sets the behavior of an attribute's values when a feature is split. NONE —The attributes of the two resulting features take on a copy of the original value. RATIO —The attributes of resulting features are a ratio of the original feature's value. The ratio is based on the division of the original geometry. If the geometry is divided equally, each new feature's attribute gets one-half of the value of the original object's attribute.	String

exportToString ()

返回值

数据类型	说明
String	The string representation of the object.

findFieldByName (field_name)

参数	说明	数据类型
field_name	The field name used to find its index position	String

返回值

数据类型	说明
Integer	The index position

findFieldByNewName (field_name)

参数	说明	数据类型
field_name	The new field name used to find its index position.	String

返回值

数据类型	说明
Integer	The index position.

getFieldName (index)

参数	说明	数据类型
index	The index position.	Integer

返回值

数据类型	说明
String	The field name.

getNewName (index)

参数	说明	数据类型
index	The index position.	Integer

返回值

数据类型	说明
String	The new field name.

getSplitRule (index)

参数	说明	数据类型
index	The index position.	String

返回值

数据类型	说明
String	The split rule. NONE —The attributes of the two resulting features take on a copy of the original value. RATIO —The attributes of resulting features are a ratio of the original feature's value. The ratio is based on the division of the original geometry. If the geometry is divided equally, each new feature's attribute gets one-half of the value of the original object's attribute.

getVisible (index)

参数	说明	数据类型
index	The index position.	String

返回值

数据类型	说明
String	The visible flag. VISIBLE —Field is visible. HIDDEN —Field is hidden.

loadFromString (string)

参数	说明	数据类型
string	The string representation of the object.	String

removeField (index)

参数	说明	数据类型
index	The index position of the field info object.	Integer

setFieldName (index, field_name)

参数	说明	数据类型
index	The index position.	Integer
field_name	The field name to set into the table.	String

setNewName (index, new_field_name)

参数	说明	数据类型
index	The index position.	None
new_field_name	The new field name to set into the table.	String

setSplitRule (index, rule)

参数	说明	数据类型
index	The index position.	Integer
rule	The split rule to set into the table. NONE —The attributes of the two resulting features take on a copy of the original value. RATIO —The attributes of resulting features are a ratio of the original feature's value. The ratio is based on the division of the original geometry. If the geometry is divided equally, each new feature's attribute gets one-half of the value of the original object's attribute.	String

setVisible (index, visible)

参数	说明	数据类型
index	The index position.	Integer
visible	The visible policy to set into the table. VISIBLE —Field is visible. HIDDEN —Field is hidden.	String

代码实例

FieldInfo 示例

显示要素图层的 FieldInfo 属性。

import arcpy

feature_class = "c:/Data/wells.shp"
layer = "temp_layer"
arcpy.MakeFeatureLayer_management(feature_class, layer)

# Create a describe object
desc = arcpy.Describe(layer)

# If a feature layer, continue
if desc.dataType == "FeatureLayer":

    # Create a fieldinfo object
    field_info = desc.fieldInfo

    # Use the count property to iterate through all the fields
    for index in xrange(0, field_info.count):
        # Print fieldinfo properties
        print("Field Name: {0}".format(field_info.getFieldName(index)))
        print("\tNew Name:   {0}".format(field_info.getNewName(index)))
        print("\tSplit Rule: {0}".format(field_info.getSplitRule(index)))
        print("\tVisible:    {0}".format(field_info.getVisible(index)))