ProbRegions.py

#-------------------------------------------------------------------------------
# Name:        ProbabilityRegions (ProbRegions.py)
# Purpose: Copy Probability Regions over to Segments.
#
# Author:      Don Ferguson
#
# Created:     01/25/2012
# Copyright:   (c) Don Ferguson 2012
# Licence:
#  This program is free software: you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation, either version 3 of the License, or
#  (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  The GNU General Public License can be found at
#  <http://www.gnu.org/licenses/>.
#-------------------------------------------------------------------------------
#!/usr/bin/env python

# Import arcpy module
import arcpy
import string

##workspc = arcpy.GetParameterAsText(0)
##arcpy.env.workspace = workspc

fc1 = "Probability_Regions"
fc2 = "Search_Segments"
fc3 = "8 Segments_Group\\Probability Regions"

arcpy.CalculateField_management(fc3, "Area", "!shape.area@acres!", "PYTHON_9.3", "")

POCList=[]
rows = arcpy.SearchCursor(fc1)
for row in rows:
    POCList.append(row.POCaSsign)

POCTotal = sum(POCList)

rows1 = arcpy.UpdateCursor(fc3)
row1 = rows1.next()

while row1:
    # you need to insert correct field names in your getvalue function
    RegionName = row1.Region_Name
    RegArea = row1.Area
    if POCTotal==0.0:
        POCTotal=1.0
    POCReg = row1.POCaSsign/POCTotal * 100.0
    row1.POA = POCReg
    row1.POAcum = POCReg
    if RegArea != 0.0:
        PdenReg = round(POCReg/RegArea,3)
    else:
        PdenReg = 0.0

    row1.Pden=PdenReg

    where2 = '"Region_Name" = ' + "'" + RegionName + "'"
    arcpy.AddMessage(where2)
    rows2 = arcpy.SearchCursor(fc2, where2)
    row2 = rows2.next()

    arcpy.SelectLayerByAttribute_management(fc3,"NEW_SELECTION",where2)

    if row2:
        arcpy.AddMessage(RegionName + " already exists as a Segment")
        row2 = rows2.next()

    else:
        arcpy.SelectLayerByAttribute_management(fc3,"NEW_SELECTION",where2)
        arcpy.Append_management(fc3, fc2, "NO_TEST", "", "")
        rows3 = arcpy.UpdateCursor(fc2,where2)
        for row3 in rows3:
            if RegionName == 'ROW':
                row3.Area_Name = RegionName
            else:
                row3.Area_Name = RegionName + "01"
            row3.Area_seg = RegArea
            row3.POA = POCReg
            row3.sPOC_Orig = POCReg
            row3.POC_Now = POCReg
            row3.Pden = PdenReg
            row3.Status = "Not Assigned"
            row3.Searched = 0
            row3.Display = 1
            row3.PODcum = 0
            row3.PODcumunrsp = 0
            rows3.updateRow(row3)
        del row3
        del rows3

    del where2
    del row2
    del rows2

    rows1.updateRow(row1)
    row1 = rows1.next()
arcpy.AddMessage("DONE")

del rows1
del row1