摘要
Network Analyst Solver 对象提供特定于网络分析求解器的分析属性。
说明
所有网络分析求解程序共有的属性（如 impedance）可通过描述网络分析图层直接确定。 但部分属性（如 UseTimeWindows）仅由特定求解器支持，如此例中的路径求解器。 Network Analyst Solver 对象上的可用属性取决于网络分析图层所引用的求解器。 使用 solverName 属性确定网络分析图层正在引用的求解器，并使用下面的链接确定对象上的可用属性。
代码示例
显示 Network Analyst Solver 对象中的属性。
# Name: NALayerSolverProperties_ex01.py
# Description: Lists all the solver specific properties that can be
# derived by describing a network analysis layer.
import arcpy
# ============
# Helper functions
# ============
def printRoute(justify=35):
'''Displays information about a Route layer'''
arcpy.AddMessage("---- Route properties:")
props = desc.solverProperties
arcpy.AddMessage(" %*s: %s" % (justify, "Layer Name?" , desc.nameString))
arcpy.AddMessage(" %*s: %s" % (justify, "Find Best Sequence?",
props.findBestSequence))
arcpy.AddMessage(" %*s: %s" % (justify, "OrderingType",
props.orderingType))
arcpy.AddMessage(" %*s: %s" % (justify, "Use Time Windows?",
props.useTimeWindows))
arcpy.AddMessage(" %*s: %s" % (justify, "Output Route Shape",
props.routesShape))
arcpy.AddMessage(" %*s: %s" % (justify, "Start Time", props.startTime))
def printClosestFac(justify=35):
'''Displays information about a Closest Facility layer'''
arcpy.AddMessage("---- Closest Facilty properties:")
props = desc.solverProperties
arcpy.AddMessage(" %*s: %s" % (justify, "Layer Name?" , desc.nameString))
arcpy.AddMessage(" %*s: %s" % (justify, "Travel Direction",
props.travelDirection))
arcpy.AddMessage(" %*s: %s" % (justify, "Default Target Facility Count",
props.defaultTargetFacilityCount))
arcpy.AddMessage(" %*s: %s" % (justify, "Default Cutoff",
props.defaultCutoff))
arcpy.AddMessage(" %*s: %s" % (justify, "Output Route Shape",
props.cfRoutesShape))
def printServiceArea(justify=35):
'''Displays information about a Service Area layer'''
arcpy.AddMessage("---- Service Area properties:")
props = desc.solverProperties
arcpy.AddMessage(" %*s: %s" % (justify, "Layer Name?" , desc.nameString))
arcpy.AddMessage(" %*s: %s" % (justify, "Travel Direction",
props.travelDirection))
arcpy.AddMessage(" %*s: %s" % (justify, "Default breaks",
props.defaultBreaks))
# Polygon info
arcpy.AddMessage(" ")
arcpy.AddMessage(" %*s: %s" % (justify, "Polygon Type?",
props.serviceAreaPolygons))
arcpy.AddMessage(" %*s: %s" % (justify, "Overlap Type",
props.serviceAreaPolygonType))
arcpy.AddMessage(" %*s: %s" % (justify, "Multiple Facilities Options?",
props.mergeSimilarRanges))
arcpy.AddMessage(" %*s: %s" % (justify, "Excluded sources",
props.exclusionSources))
arcpy.AddMessage(" %*s: %s" % (justify, "Trim Polygons?",
props.trimPolygons))
arcpy.AddMessage(" %*s: %s" % (justify, "Trim Distance?",
props.trimDistance))
# Line info
arcpy.AddMessage(" ")
arcpy.AddMessage(" %*s: %s" % (justify, "Line overlap type",
props.serviceAreaLinesType))
arcpy.AddMessage(" %*s: %s" % (justify, "Split lines at breaks?",
props.splitLinesAtBreaks))
arcpy.AddMessage(" %*s: %s" % (justify, "Output line shape",
props.serviceAreaLines))
arcpy.AddMessage(" %*s: %s" % (justify, "Output line shape",
props.includeNetworkSourceFields))
def printODMatrix(justify=40):
'''Displays information about an OD Cost Matrix layer.'''
arcpy.AddMessage("---- OD Cost Matrix properties:")
props = desc.solverProperties
arcpy.AddMessage(" %*s: %s" % (justify, "Layer Name?" , desc.nameString))
arcpy.AddMessage(" %*s: %s" % (justify, "Default Target Destination Count",
props.defaultTargetDestinationCount))
arcpy.AddMessage(" %*s: %s" % (justify, "Default Cutoff",
props.defaultCutoff))
arcpy.AddMessage(" %*s: %s" % (justify, "Output Route Shape",
props.odLinesShape))
def printVRP(justify=35):
'''Displays information about a Vehicle routing problem layer'''
arcpy.AddMessage("---- Vehicle Routing Problem properties:")
props = desc.solverProperties
arcpy.AddMessage(" %*s: %s" % (justify, "Layer Name?" , desc.nameString))
arcpy.AddMessage(" %*s: %s" % (justify, "Default Date",
props.defaultDate))
arcpy.AddMessage(" %*s: %s" % (justify, "Capacity Count",
props.capacityCount))
arcpy.AddMessage(" %*s: %s" % (justify, "Time Field Units",
props.timeFieldUnits))
arcpy.AddMessage(" %*s: %s" % (justify, "Distance Field Units",
props.distanceFieldUnits))
arcpy.AddMessage(" %*s: %s" % (justify, "Output Route Shape",
props.vrpRoutesShape))
arcpy.AddMessage(" %*s: %s"%(justify,"Time window violation penalty factor",
props.timeWindowViolationPenaltyFactor))
arcpy.AddMessage(" %*s: %s"%(justify,"Penalty factor value",
props.timeWindowViolationPenaltyFactorValue))
arcpy.AddMessage(" %*s: %s" % (justify,"Excess transit time penalty factor",
props.excessTransitTimePenaltyFactor))
arcpy.AddMessage(" %*s: %s" % (justify,"Penalty factor value",
props.excessTransitTimePenaltyFactorValue))
def printLocationAllocation(justify=35):
'''Displays information about a Location-Allocation layer'''
arcpy.AddMessage("---- Location-Allocation properties:")
props = desc.solverProperties
arcpy.AddMessage(" %*s: %s" % (justify, "Layer Name?" , desc.nameString))
arcpy.AddMessage(" %*s: %s" % (justify, "Travel from" ,
props.travelDirection))
arcpy.AddMessage(" %*s: %s" % (justify, "Location-allocation problem type",
props.problemType))
arcpy.AddMessage(" %*s: %s" % (justify, "Number of facilities to find",
props.defaultTargetFacilityCount))
arcpy.AddMessage(" %*s: %s" % (justify, "Impedance cutoff",
props.defaultCutoff))
arcpy.AddMessage(" %*s: %s" % (justify, "Impedance transformation",
props.impedanceTransformation))
arcpy.AddMessage(" %*s: %s" % (justify, "Impedance parameter",
props.impedanceParameter))
arcpy.AddMessage(" %*s: %s" % (justify, "Target market share",
props.targetMarketShare))
arcpy.AddMessage(" %*s: %s" % (justify, "Output path shape",
props.laLinesShape))
# ============
# main module
# ============
# Get the arguments..
in_layer = "C:/Data/Route.lyr"
justify = 35
#Describe the layer file and get the solver name
desc = arcpy.Describe(in_layer)
solvername = desc.solvername
# Branch on type of solver (Route, Closest Facility, etc)
if solvername.lower() == "route solver":
printRoute(justify)
elif solvername.lower() == "closest facility solver":
printClosestFac(justify)
elif solvername.lower() == "service area solver":
printServiceArea(justify)
elif solvername.lower() == "od cost matrix solver":
printODMatrix(justify)
elif solvername.lower() == "vehicle routing problem solver":
printVRP(justify)
elif solvername.lower() == "location-allocation solver":
printLocationAllocation(justify)
else:
arcpy.AddError("Unknown solver: %s" % solvername)
arcpy.AddMessage(" ")
arcpy.AddMessage("==== End description ====")
arcpy.AddMessage(" ")