mergeVals = [row.getValue(fld) for fld in mergeFlds]
inter[(source, target)] = mergeVals
reversed = (target, source)
# if reversed in inter:
# inter[(source, target)] = inter[reversed]
# inter[reversed] = mergeVals
# else:
# inter[(source, target)] = mergeVals
del readCursor, row
common.progress('creating output fields')
outFlds = [('M_' + fld)[:10] for fld in mergeFlds]
existFlds = common.fieldList(interLayer)
for i in range(len(outFlds)):
if outFlds[i] in existFlds:
common.warning('Field %s already exists, contents will be overwritten' % outFlds[i])
arcpy.DeleteField_management(interLayer, outFlds[i])
else:
arcpy.AddField_management(interLayer, outFlds[i], common.fieldType(type(mergeVals[i]))) # uses mergeVals from previous cycle... dragons
common.progress('writing output')
writeCursor = arcpy.UpdateCursor(interLayer)
for row in writeCursor:
reversed = (row.getValue(toFld), row.getValue(fromFld))
if reversed in inter:
values = inter[reversed]
for i in range(len(values)):
row.setValue(outFlds[i], values[i])
else:
for i in range(len(outFlds)):
row.setNull(outFlds[i])
writeCursor.updateRow(row)
del writeCursor, row
common.progress("starting route search")
connRows = arcpy.SearchCursor(TMP_RSING_LAY, "", "", "", sorter)
prevOID = None
prevDID = None
prevImp = None
start = True
sequence = False # if a sequence of identical tuples of O_ID, D_ID has been detected
for connRow in connRows:
oID = connRow.getValue(oIDFld)
dID = connRow.getValue(dIDFld)
impedVal = connRow.getValue(impedance)
if start: # start at the second row
start = False
# add fields to output table and open cursor
common.progress("preparing output table")
arcpy.AddField_management(outputPath, common.NEIGH_FROM_FLD, common.fieldType(type(oID)))
arcpy.AddField_management(outputPath, common.NEIGH_TO_FLD, common.fieldType(type(dID)))
arcpy.AddField_management(outputPath, impedance, common.fieldType(type(impedVal)))
common.progress("opening output table")
outputRows = arcpy.InsertCursor(outputPath)
common.progress("writing output")
else:
if oID == prevOID and dID == prevDID: # same as previous, detect sequence
sequence = True
else:
if sequence: # end of sequence, disregard it
sequence = False
else: # unique record - add neighbour record
outRow = outputRows.newRow()
outRow.setValue(common.NEIGH_FROM_FLD, prevOID)
outRow.setValue(common.NEIGH_TO_FLD, prevDID)
