Array (arcpy)

摘要

The array object can contain any number of geoprocessing objects such as points, geometries, or spatial references.

语法

Array ({items})

参数	说明	数据类型
items	Items can include a list, a Point object, or another Array object.	Object

属性

属性	说明	数据类型
count (只读)	The element count of the array.	Integer

方法概述

方法	说明
add (value)	Adds a point or array object to the end of the array
append (value)	Appends an object to the array in the last position.
clone (point_object)	Clone the point object.
extend (items)	Extends the array by appending elements.
getObject (index)	Returns the object at the given index position in the array.
insert (index, value)	Adds an object to the array at the specified index.
next ()	Returns the next object at the current index.
remove (index)	Removes the object at the specified index position from the array.
removeAll ()	Removes all values and creates an empty object.
replace (index, value)	Replaces the object at the specified index position in the array.
reset ()	Sets the current enumeration index (used by the next method) back to the first element.

方法

add (value)

参数	说明	数据类型
value	Either a point or array object can be appended to the array.	Object

append (value)

参数	说明	数据类型
value	Either a point or array object can be appended to the array.	Object

clone (point_object)

参数	说明	数据类型
point_object	A point object.	Point

extend (items)

参数	说明	数据类型
items	Extends the array by adding strings, integers, or lists.	Object

getObject (index)

参数	说明	数据类型
index	The index position of the array.	Integer

返回值

数据类型	说明
Object	The array or point object at the index position.

insert (index, value)

参数	说明	数据类型
index	The index position of the array.	Integer
value	Either a point or array object can be inserted into the array.	Object

next ()

返回值

数据类型	说明
Object	The next object at the current index.

remove (index)

参数	说明	数据类型
index	The index position that will be removed.	Integer

removeAll ()

replace (index, value)

参数	说明	数据类型
index	The index position that will be replaced.	Integer
value	The new point or array object to be added to the array.	Object

reset ()

代码实例

Array example

Create a polyline feature class from scratch.

import arcpy

# A list of features and coordinate pairs
#
coordList = [[[1,2], [2,4], [3,7]],
            [[6,8], [5,7], [7,2], [9,5]]]

# Create empty Point and Array objects
#
point = arcpy.Point()
array = arcpy.Array()

# A list that will hold each of the Polyline objects 
# 
featureList = []

for feature in coordList:
    # For each coordinate pair, set the x,y properties and add to the 
    #  Array object.
    #
    for coordPair in feature:
        point.X = coordPair[0]
        point.Y = coordPair[1]
        array.add(point)

    # Create a Polyline object based on the array of points
    #
    polyline = arcpy.Polyline(array)

    # Clear the array for future use
    #
    array.removeAll()

    # Append to the list of Polyline objects
    #
    featureList.append(polyline)

# Create a copy of the Polyline objects, by using featureList as input to 
#  the CopyFeatures tool.
#
arcpy.CopyFeatures_management(featureList, "c:/geometry/polylines.shp")