Arcpy 随机选取部分要素并导出

Arcpy 随机选取部分要素并导出

# Import system modules
import arcpy, os, time
import random
from arcpy import env
 
print '程序开始：' + str(time.ctime())  
# Set environment settings
env.workspace = "D:\pythonlearint.gdb"
 
# Set local variables
inFeatures = "毕节市矢量图1228"
fieldName1 = "RD"
fieldPrecision = 9
fieldAlias = "随机数字"
 
# Execute AddField
arcpy.AddField_management(inFeatures, fieldName1, "DOUBLE", fieldPrecision, "", "",
                          fieldAlias, "NULLABLE")
 
field1 = "RD"
cursor = arcpy.UpdateCursor(inFeatures)
for row in cursor:
    # 随机赋值
    row.setValue(field1, random.random())
    cursor.updateRow(row)
 
 
#导出选择的数据集
arcpy.MakeFeatureLayer_management(inFeatures, "lyr") 
arcpy.SelectLayerByAttribute_management("lyr", "NEW_SELECTION", ' "RD" < 0.05 ')
 
 
# Write the selected features to a new featureclass
arcpy.CopyFeatures_management("lyr", "RD_Train")
 
print '程序结束：' + str(time.ctime()) 
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作者：刘金榜 
来源：CSDN 
原文：https://blog.csdn.net/sprintwater/article/details/26239691 
版权声明：本文为博主原创文章，转载请附上博文链接！