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LauraBlackburn
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since
07-04-2014
11-11-2020
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(0 Idea Submissions)Latest Contributions by LauraBlackburn
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Hi Tony, I am using IDLE on a 64 bit windows 7. I am new to python, so I don't know how to do the in_memory workspace. Can you walk me through it? I just find it odd that it went so much faster a few months ago and now it's super slow.
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06-03-2015
01:40 PM
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5147
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I have a script that is creates a buffer around points, converts the round buffers to squares, clips a road layers with the square, then calculates the length for the clipped roads and exports data to a csv file. I have run this script before and it took roughly 3 days to complete. This time when I ran the code it's projected to take a month to mine the data. I have no idea why it might be slowing down and could really use some help figuring this out. Does anyone know how I could speed up this process? # -*- coding: utf-8 -*-
# ---------------------------------------------------------------------------
# 2_TrapStatsAndFloatingRoadDensity.py
# Altered on: 2015-6-2 10:00 am
# Created by: L.M.Blackburn
# ArcGIS 10.1
# Notes: iterates thru orders shapefiles and creates a buffer
# around each point. The round buffer is converted to a feature envelope
# which makes a square polygon around the point. This square is used to
# clip the roads layer. Then I calculate length for the clipped roads by adding
# a field and calculating geometry. Run statistics to get the sum length
# of roads in each square. export sum length, block name, centroid of
# square out to a text file
# (2nd script for 4th part of analysis)
# Needed data: Order sublayer from VRP
# List of fields to drop
# Roads network to get length data
# ---------------------------------------------------------------------------
# Import arcpy module
import arcpy, os, sys, traceback, csv
# Set the necessary product code
import arceditor
import arcinfo
# Set workspace environment - this is where the solved route layers are located
arcpy.env.workspace = 'F:\\Workspace\\Sandy\\GM_costAnalysis\\analysisMay15cont\\Orders\\'
arcpy.env.overwriteOutput = True
# --------------------Set local variables ------------------
# ---workspace for order layers
ordersLyr = 'F:\\Workspace\\Sandy\\GM_costAnalysis\\analysisMay15cont\\Orders\\'
# ---workspace for buffer layers
bufferLyr = 'F:\\Workspace\\Sandy\\GM_costAnalysis\\analysisMay15cont\\Buffers\\'
# ---set default buffer distance
bufDefault = "6000 Meters"
# ---workspace for envelope layers
envelopeLyr = 'F:\\Workspace\\Sandy\\GM_costAnalysis\\analysisMay15cont\\Envelopes\\'
# ---workspace for route layers
routeWkspc = 'F:\\Workspace\\Sandy\\GM_costAnalysis\\analysisMay15cont\\Routes\\'
# ---set workspace path for clipped roads
outDataPath = 'F:\\Workspace\\Sandy\\GM_costAnalysis\\analysisMay15cont\\ClipRoads\\'
# ---set road layer - for use in clip & length
Road = 'F:\\Workspace\\Sandy\\GM_costAnalysis\\RoadsForSnap\\SDC Edge Source.shp'
# ---fields to delete from Orders layers
dropFields = ["Descriptio", "ServiceTim", "TimeWind_1", "TimeWind_2", "TimeWind_3", "TimeWindow", "MaxViolati", "MaxViola_1", \
"PickupQuan", "DeliveryQu", "Revenue", "SpecialtyN", "Assignment", "RouteName", "ViolatedCo", "CumulTrave", \
"CumulDista", "CumulTime", "ArriveCurb", "DepartCurb", "DepartTime", "WaitTime", "ViolationT", "CumulWaitT", \
"CumulViola", "ArriveTime", "SourceID", "SourceOID", "PosAlong", "SideOfEdge", "CurbApproa", "Status"]
try:
print 'Opening CSV file...'
# Step 1 - Create table for output data
# Needed fields: From script [Block, Scale, Sequence, FromPrevTr, FromPrevDi, totTime, totDist, x, y, totalRdLength]
CSVFile = 'F:\\Workspace\\Sandy\\GM_costAnalysis\\analysisMay15cont\\AllTrapsData_June2.csv'
f = open (CSVFile, "wb")
w = csv.writer(f, delimiter=',', lineterminator='\n')
fieldNames = ['Block', 'Scale', 'BufferType', 'Sequence', 'FromPrevTr', 'FromPrevDi', 'x', 'y', 'bufferDist','totTime', \
'totDist', 'totalRdLength', '\n']
w.writerow(fieldNames)
# Step 2 - Loop through files in orders folder
# Create variable to hold orders feature class files
'''
orderList = arcpy.ListFiles("*.shp")
# Loop through layers & break name into segments to be used when naming orders lyrs
print 'Creating Buffers...'
for shp in orderList:
lyrs = arcpy.mapping.Layer(ordersLyr + shp)
splitName =shp.split('_')
block = splitName[0]
scale = splitName[1].rstrip('.shp')
# define buffer distance
if scale == "1K":
bufDist = "1000 Meters"
elif scale == "2K":
bufDist = "2000 Meters"
elif scale == "3K":
bufDist = "3000 Meters"
elif scale == "4K":
bufDist = "4000 Meters"
elif scale == "6K":
bufDist = "6000 Meters"
elif scale == "500":
bufDist = "500 Meters"
else:
bufDist = bufDefault
print 'Order: ' + shp + ', Buffer: ' + bufDist
# Jump into orderLayers to delete unneeded fields & add XY
arcpy.DeleteField_management(shp, dropFields)
arcpy.AddXY_management(shp)
# Step 4 - Run buffer on order layers
arcpy.Buffer_analysis(shp, bufferLyr + 'buf' + '_' + block + '_' + scale, bufDist, 'FULL', 'ROUND', 'NONE', '#')
arcpy.Buffer_analysis(shp, bufferLyr + 'buf2' + '_' + block + '_' + scale, bufDefault, 'FULL', 'ROUND', 'NONE', '#')
bufferList = []
for dpath, dnames, fnames in arcpy.da.Walk(bufferLyr, datatype = 'FeatureClass', type = 'Polygon'):
for files in fnames:
bufferList.append(os.path.join(files))
# Step 5 - Run feature envelope to polygon on buffer layers
print 'Converting round buffers to squares...'
for bufShp in bufferList:
bufSplitName = bufShp.split('_')
blockID = bufSplitName[1]
scaleID = bufSplitName[2].rstrip('.shp')
bufID = bufSplitName[0]
print 'Buffer: ' + bufShp + ' Block: ' + blockID + ' Scale: ' + scaleID + ' BufferType: ' + bufID
arcpy.FeatureEnvelopeToPolygon_management(bufferLyr + bufShp, envelopeLyr + bufID + '_' + blockID + '_' + scaleID, 'SINGLEPART')
'''
# Step 6 - Calculate totalTime and totalDistance using insert cursor
# loop through each record in the table - calculate values and...
# use selected features to clip roads layer & calculate geometry
# add values to the CSV table
print 'Populating CSV file...'
envelopeList = []
for dirpath, dirnames, filenames in arcpy.da.Walk(envelopeLyr, datatype = 'FeatureClass', type = 'Polygon'):
for filename in filenames:
envelopeList.append(os.path.join(filename))
for eLayer in envelopeList:
eLayerName = eLayer.split('_')
blockEID = eLayerName[1]
scaleEID = eLayerName[2].rstrip('.shp')
bufEID = eLayerName[0]
print 'eLayer: ' + eLayer + ' Block: ' + blockEID + ' Scale: ' + scaleEID + ' BufferType: ' + bufEID
eLyrPath = envelopeLyr + eLayer
#Make a layer from the feature class - needed for selecting records to be used in the clipping
arcpy.MakeFeatureLayer_management(eLyrPath, "clipLayer")
# use search cursor to grab data row by row to populate CSV file
with arcpy.da.SearchCursor(eLyrPath, ("Sequence", "FromPrevTr", "FromPrevDi", "POINT_X", "POINT_Y",
"BUFF_DIST")) as cursor:
for row in cursor:
dataList = []
dataList.append(str(blockEID))
dataList.append(str(scaleEID))
dataList.append(str(bufEID))
dataList.append(str(row[0]))
dataList.append(str(row[1]))
dataList.append(str(row[2]))
dataList.append(str(row[3]))
dataList.append(str(row[4]))
dataList.append(str(row[5]))
n = int(row[0])
sN = "=" + str(n)
n2 = n +1
sel = "=" + str(n2)
prevTime = float(row[1])
prevDist = float(row[2])
# print sN
postTime = ""
# use a nested search to get values for total time and total distance
# there are some cases where the below expression will be false in that
# event we will need to cacluclate the distance to the depot or just leave
# the values for prevTime & prevDist as place holders, otherwise I end up with
# road length being written in the wrong field
expression = arcpy.AddFieldDelimiters(eLyrPath, "Sequence")+ sel
for row2 in arcpy.da.SearchCursor(eLyrPath, ("FromPrevTr", "FromPrevDi"), expression):
postTime = row2[0]
totTime = prevTime + float(postTime)
# print totTime
dataList.append(str(totTime))
postDist = row2[1]
# print postDist
totDist = prevDist + float(postDist)
# print totDist
dataList.append(str(totDist))
# if above for loop yeilds no results, calculate postTime and postDist differently
# grab DepotVisits layer - if VisitType = "End" then grab values for "FromPrevTravelTime" & "FromPrevDistance"
if postTime == "":
#select corresponding route layer file and grab sublayer: DepotVisits
print "extracting time & distance to Depot"
routeLyr = arcpy.mapping.Layer(routeWkspc + "TrapRoute_" + blockEID + "_" + scaleEID + ".lyr")
if routeLyr.isGroupLayer:
for sublyrs in routeLyr:
# print sublyrs.name
if sublyrs.name == 'Depot Visits':
arcpy.MakeFeatureLayer_management(sublyrs, "depotVisits")
qLast = "= 2"
expression2 = arcpy.AddFieldDelimiters("depotVisits", "VisitType")+ qLast
for row3 in arcpy.da.SearchCursor("depotVisits", ("FromPrevTravelTime", "FromPrevDistance"), expression2):
postTime2 = row3[0]
totTime2 = prevTime + float(postTime2)
# print ("Depot Visit Time: {0}, {1}, {2}".format(prevTime, postTime2, totTime2))
dataList.append(str(totTime2))
postDist2 = row3[1]
totDist2 = prevDist + float(postDist2)
# print ("Depot Visit Distance: {0}, {1}, {2}".format(prevDist, postDist2, totDist2))
dataList.append(str(totDist2))
# select single record to use when clipping - this selection must be on a layer not fc
# always create where clause using AddFieldDelimiters
seqField = "Sequence"
where_clause = arcpy.AddFieldDelimiters("clipLayer", seqField)+ sN
arcpy.SelectLayerByAttribute_management("clipLayer", "NEW_SELECTION", where_clause)
# Clip roads w/ selected polygon - for this I will need a search cursor
clipRoads = outDataPath + 'rdsClip_' + blockEID + '_' + scaleEID + '_' + bufEID + '_' + str(n)
arcpy.Clip_analysis(Road, "clipLayer", clipRoads)
clipRoadsShp = clipRoads + ".shp"
# Use geometry/length to get the total length of clipped roads(in meters)
g = arcpy.Geometry()
geometryList = arcpy.CopyFeatures_management(clipRoadsShp, g)
length = 0
for geometry in geometryList:
length +=geometry.length
# append length (meters) at end of line to csv dataList
dataList.append(str(length))
# dataList.append('\r\n')
# print length
# Write dataList to csv file ---- may need to dedent this one more time ---
w.writerow(dataList)
# print dataList
print 'Script complete'
f.close()
except:
if arcpy.Exists(CSVFile):
w.writerow(dataList)
print 'Data written in CSV file'
f.close()
print 'Program failed.'
print 'Check python errors.'
tb = sys.exc_info()[2]
tbinfo = traceback.format_tb(tb)[0]
pymsg = "PYTHON ERRORS:\nTraceback Info:\n" + tbinfo + "\nError Info:\n " + str(sys.exc_type) + ": " + str(sys.exc_value) + "\n"
msgs = "ARCPY ERRORS:\n" + arcpy.GetMessages(2) + "\n"
arcpy.AddError(msgs)
arcpy.AddError(pymsg)
print msgs
print pymsg
arcpy.AddMessage(arcpy.GetMessages(1))
print arcpy.GetMessages(1)
# print ("Points to select: {0}, Radius: {1}".format(centroidPath, radius))
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06-03-2015
12:54 PM
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35
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13049
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Thank you Melinda! I was able to use the Update Analysis layer attribute parameter tool to change the time for the roads with speeds of less than 20 mph using the following lines of code. arcpy.na.UpdateAnalysisLayerAttributeParameter(outNALayer, "Time", "1MPH", 20) arcpy.na.UpdateAnalysisLayerAttributeParameter(outNALayer, "Time", "5MPH", 20) arcpy.na.UpdateAnalysisLayerAttributeParameter(outNALayer, "Time", "OtherRoads", 20)
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05-15-2015
10:00 AM
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0
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0
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766
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Hi All, I have python code that runs the vehicle routing problem in Network Analyst. I am using a Streets SDC-based network dataset to solve the VRP. However, this dataset is uneditable. I have run into issues with some road segments with speed limits under 20MPH and would like to change the time attribute associated with those roads. I cannot edit the streets table and I cannot edit the network dataset's attributes. So, I was hoping to be able to set the time attribute parameters in python. However, I am not sure how to go about doing this. Has anyone else done this? If not, where do I find a streets network dataset that I can edit? Any help is greatly appreciated!
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05-12-2015
07:04 AM
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0
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2
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4283
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Thanks Xander, Darren and Ian! Xander, you were correct - it was the fact that n was an integer. That and the problem of syntax in the where clause. So I ended up doing the following and now my code works. sN = "=" + str(n)
seqField = "Sequence"
where_clause = arcpy.AddFieldDelimiters("clipLayer", seqField)+ sN
arcpy.SelectLayerByAttribute_management("clipLayer", "NEW_SELECTION", where_clause)
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04-10-2015
12:10 PM
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0
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0
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1471
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Thanks Darren - I will try that and see what happens. I was a bit confused by the two different styles of search cursors when I started writing the code.
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04-10-2015
10:46 AM
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0
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1
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1471
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Here are my python errors: ERROR 000358: Invalid expression Failed to execute (SelectLayerByAttribute). PYTHON ERRORS: Traceback Info: File "F:\Workspace\Sandy\GM_costAnalysis\scripts\Scripts_GMSurvellience-Analysis 4\2_TrapStatsAndFloatingRoadDensity.py", line 172, in <module> arcpy.SelectLayerByAttribute_management("clipLayer", "NEW_SELECTION", '"Sequence" = \''+ n +'\'') Error Info: <class 'Queue.Empty'>: Here is the latest version of the selectLayerByAttribute call seqField = "Sequence"
where_clause = "{} = '{}'".format(seqField, n)
arcpy.SelectLayerByAttribute_management("clipLayer", "NEW_SELECTION", where_clause)
I think the issue is likely the syntax of the where clause. Though, I tried using formats exactly like that from the ArcGIS help. The other issue that it may be - is that I am performing this selection inside of a cursor loop. Any help or suggestions are greatly appreciated!
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04-10-2015
10:34 AM
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0
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5
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1471
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I am writing code to iterate thru each feature in a polygon feature class and use the selected feature to clip a roads layer and calculate length. The data from the polygon feature class, and the length of the roads for each polygon is output to a CSV file. The code is working except for the arcpy.SelectLayerByAttribute_management line (line 173). This seems to break my code and I am have troubles figuring out why or coming up with a reasonable solution. Any help is greatly appreciated. # -*- coding: utf-8 -*-
# ---------------------------------------------------------------------------
# 2_TrapStatsAndFloatingRoadDensity.py
# Created on: 2015-4-8 1:30 pm
# Completed on: 2015-4-9
# Created by: L.M.Blackburn
# ArcGIS 10.1
# Notes: iterates thru orders shapefiles and creates a buffer
# around each point. The round buffer is converted to a feature envelope
# which makes a square polygon around the point. This square is used to
# clip the roads layer. Then I calculate length for the clipped roads by adding
# a field and calculating geometry. Run statistics to get the sum length
# of roads in each square. export sum length, block name, centroid of
# square out to a text file
# (2nd script for 4th part of analysis)
# Needed data: Order sublayer from VRP
# List of fields to drop
# Roads network to get length data
# ---------------------------------------------------------------------------
# Import arcpy module
import arcpy, os, sys, traceback, csv
# Set the necessary product code
import arceditor
import arcinfo
# Set workspace environment - this is where the solved route layers are located
arcpy.env.workspace = 'F:\\Workspace\\Sandy\\GM_costAnalysis\\analysis2\\OrdersProjected\\'
# --------------------Set local variables ------------------
# ---workspace for order layers
ordersLyr = 'F:\\Workspace\\Sandy\\GM_costAnalysis\\analysis2\\OrdersProjected\\'
# ---workspace for buffer layers
bufferLyr = 'F:\\Workspace\\Sandy\\GM_costAnalysis\\analysis2\\Buffers\\'
# ---set default buffer distance
bufDefault = "6000 Meters"
# ---workspace for envelope layers
envelopeLyr = 'F:\\Workspace\\Sandy\\GM_costAnalysis\\analysis2\\Envelopes\\'
# ---set workspace path for clipped roads
outDataPath = 'F:\\Workspace\\Sandy\\GM_costAnalysis\\analysis2\\ClipRoads\\'
# ---set road layer - for use in clip & length
Road = 'F:\\Workspace\\Sandy\\GM_costAnalysis\\RoadsForSnap\\SDC Edge Source.shp'
# ---fields to delete from Orders layers
dropFields = ["Descriptio", "ServiceTim", "TimeWind_1", "TimeWind_2", "TimeWind_3", "TimeWindow", "MaxViolati", "MaxViola_1", \
"PickupQuan", "DeliveryQu", "Revenue", "SpecialtyN", "Assignment", "RouteName", "ViolatedCo", "CumulTrave", \
"CumulDista", "CumulTime", "ArriveCurb", "DepartCurb", "DepartTime", "WaitTime", "ViolationT", "CumulWaitT", \
"CumulViola", "ArriveTime", "SourceID", "SourceOID", "PosAlong", "SideOfEdge", "CurbApproa", "Status"]
try:
# Step 1 - loop through each route layer and do the following processes
print 'Opening CSV file...'
# Create table for output data
# Needed fields: From script [Block, Scale, Sequence, FromPrevTr, FromPrevDi, totTime, totDist, x, y, totalRdLength]
CSVFile = 'F:\\Workspace\\Sandy\\GM_costAnalysis\\analysis2\\AllTrapsData.csv'
f = open (CSVFile, "wb")
w = csv.writer(f, delimiter=',', lineterminator='\n')
fieldNames = ['Block', 'Scale', 'Sequence', 'FromPrevTr', 'FromPrevDi', 'x', 'y', 'bufferDist','totTime', \
'totDist', 'totalRdLength', '\n']
w.writerow(fieldNames)
# Step 2 - Loop through route layers and export Order sublayers to orders folder
# Create variable to hold layer files
orderList = arcpy.ListFiles("*.shp")
# Loop through layers & break name into segments to be used when naming orders lyrs
print 'Creating Buffers...'
for shp in orderList:
lyrs = arcpy.mapping.Layer(ordersLyr + shp)
splitName =shp.split('_')
block = splitName[0]
scale = splitName[1].rstrip('.shp')
# define buffer distance - double check the buffer distances w/ Sandy (I may need to double these values)
if scale == "1K":
bufDist = "500 Meters"
elif scale == "2K":
bufDist = "1000 Meters"
elif scale == "3K":
bufDist = "1500 Meters"
elif scale == "4K":
bufDist = "2000 Meters"
elif scale == "6K":
bufDist = "3000 Meters"
elif scale == "500":
bufDist = "250 Meters"
else:
bufDist = bufDefault
print 'Order: ' + shp + ', Buffer: ' + bufDist
# Jump into orderLayers to delete unneeded fields & add XY
arcpy.DeleteField_management(shp, dropFields)
arcpy.AddXY_management(shp)
# Step 4 - Run buffer on order layers
arcpy.Buffer_analysis(shp, bufferLyr + 'buf' + '_' + block + '_' + scale, bufDist, 'FULL', 'ROUND', 'NONE', '#')
arcpy.Buffer_analysis(shp, bufferLyr + 'buf2' + '_' + block + '_' + scale, bufDefault, 'FULL', 'ROUND', 'NONE', '#')
bufferList = []
for dpath, dnames, fnames in arcpy.da.Walk(bufferLyr, datatype = 'FeatureClass', type = 'Polygon'):
for files in fnames:
bufferList.append(os.path.join(files))
# Step 5 - Run feature envelope to polygon on buffer layers
print 'Converting round buffers to squares...'
for bufShp in bufferList:
bufSplitName = bufShp.split('_')
blockID = bufSplitName[1]
scaleID = bufSplitName[2].rstrip('.shp')
bufID = bufSplitName[0]
print 'Buffer: ' + bufShp + ' Block: ' + blockID + ' Scale: ' + scaleID + ' BufferType: ' + bufID
arcpy.FeatureEnvelopeToPolygon_management(bufferLyr + bufShp, envelopeLyr + bufID + '_' + blockID + '_' + scaleID, 'SINGLEPART')
# Step 6 - Calculate totalTime and totalDistance using insert cursor
# loop through each record in the table - calculate values and...
# use selected features to clip roads layer & calculate geometry
# add values to the CSV table
print 'Populating CSV file...'
envelopeList = []
for dirpath, dirnames, filenames in arcpy.da.Walk(envelopeLyr, datatype = 'FeatureClass', type = 'Polygon'):
for filename in filenames:
envelopeList.append(os.path.join(filename))
for eLayer in envelopeList:
dataList = []
eLayerName = eLayer.split('_')
blockEID = eLayerName[1]
scaleEID = eLayerName[2].rstrip('.shp')
bufEID = eLayerName[0]
dataList.append(str(blockEID))
dataList.append(str(scaleEID))
print 'eLayer: ' + eLayer + ' Block: ' + blockEID + ' Scale: ' + scaleEID + ' BufferType: ' + bufEID
eLyrPath = envelopeLyr + eLayer
#Make a layer from the feature class - needed for selecting records to be used in the clipping
arcpy.MakeFeatureLayer_management(eLyrPath, "clipLayer")
# use search cursor to grab data row by row
with arcpy.da.SearchCursor(eLyrPath, ("Sequence", "FromPrevTr", "FromPrevDi", "POINT_X", "POINT_Y",
"BUFF_DIST")) as cursor:
for row in cursor:
dataList.append(str(row[0]))
dataList.append(str(row[1]))
dataList.append(str(row[2]))
dataList.append(str(row[3]))
dataList.append(str(row[4]))
dataList.append(str(row[5]))
n = int(row[0])
n2 = n +1
sel = "=" + str(n2)
prevTime = float(row[1])
prevDist = float(row[2])
# rQuery = '"Sequence" = \''+ n +'\'' ---this line throws errors---
expression = arcpy.AddFieldDelimiters(eLyrPath, "Sequence")+ sel
qrow = arcpy.SearchCursor(eLyrPath, where_clause=expression, fields = "FromPrevTr; FromPrevDi")
row2 = qrow.next()
while row2:
postTime = row2.getValue("FromPrevTr")
# print postTime
totTime = prevTime + float(postTime)
# print totTime
dataList.append(str(totTime))
postDist = row2.getValue("FromPrevDi")
# print postDist
totDist = prevDist + float(postDist)
# print totDist
dataList.append(str(totDist))
row2 = qrow.next()
# select single record to use when clipping
# 4/9/15 - having issues with this line
arcpy.SelectLayerByAttribute_management("clipLayer", "NEW_SELECTION", '"Sequence" = \''+ n +'\'')
# Clip roads w/ selected polygon - for this I will need a search cursor
clipRoads = outDataPath + 'rdsClip_' + blockEID + '_' + scaleEID + '_' + bufEID + '_' + str(n)
arcpy.Clip_analysis(Road, "clipLayer", clipRoads)
clipRoadsShp = clipRoads + ".shp"
# Use geometry/length to get the total length of clipped roads(in meters)
g = arcpy.Geometry()
geometryList = arcpy.CopyFeatures_management(clipRoadsShp, g)
length = 0
for geometry in geometryList:
length +=geometry.length
# append length (meters) at end of line to csv dataList
dataList.append(str(length))
# print length
# Write dataList to csv file ---- may need to dedent this one more time ---
w.writerow(dataList)
# print dataList
print 'Script complete'
f.close()
except:
if arcpy.Exists(CSVFile):
w.writerow(dataList)
print 'Data written in CSV file'
f.close()
print 'Program failed.'
print 'Check python errors.'
tb = sys.exc_info()[2]
tbinfo = traceback.format_tb(tb)[0]
pymsg = "PYTHON ERRORS:\nTraceback Info:\n" + tbinfo + "\nError Info:\n " + str(sys.exc_type) + ": " + str(sys.exc_value) + "\n"
msgs = "ARCPY ERRORS:\n" + arcpy.GetMessages(2) + "\n"
arcpy.AddError(msgs)
arcpy.AddError(pymsg)
print msgs
print pymsg
arcpy.AddMessage(arcpy.GetMessages(1))
print arcpy.GetMessages(1)
# print ("Points to select: {0}, Radius: {1}".format(centroidPath, radius))
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04-10-2015
08:32 AM
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0
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7
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5801
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Thanks for all of your help Blake! Also thanks for the link to the modes, I must have spent over an hour yesterday trying to find exactly what the various CSV format paramaters were w/o any luck.
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02-06-2015
07:51 AM
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0
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0
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6052
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Hi Blake, One quick question for you...if I use the "with open(outputCSV, "w") as csvfile:" do I also need a line to close this file? If I do, would that be at the same indent level as that "with open" statement? I did find that my file was being overwritten because the open CSV command was inside of a larger loop, so my code was just doing what I told it. Now that I have moved the statements to open the CSV and write the headers outside of my main loop for solving the VRP (not shown in the snippets above) I am no longer overwriting my data output.
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02-06-2015
06:51 AM
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6052
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I very much appreciate you all taking the time to help! When I use w.writerows() it breaks up all of my string variables into one character width fields and spits out something like this: OrderCount,TotalTravelTime,TotalDistance,Block,Scale 1,6 6,7,.,7,7,6,9,4,8,9,7,9,1 2,9,.,2,9,1,2,5,7,6,3,1 I,A,1 3,0,0,0 if I use w.writerow() it keeps writing on the same line, but the format is correct and looks like this: OrderCount,TotalTravelTime,TotalDistance,Block,Scale 16, 67.7769489791, 29.291257631, IA1, 3000 I know I am close to getting this right, I just need to tell it to write the next list of variables on the following line instead of overwriting.
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02-05-2015
01:04 PM
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0
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4
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6052
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When I try to indent my line: w.writerow(recordList), I get 5 blank lines and then 4 duplicate lines of code. So there is something weird going on here. I thought I might just be able to add a line return to my record list using recordList.append('\n') but that doesn't do it either. I am sure this isn't the most elegant way to write code, but it is my first stab at it.
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02-05-2015
12:00 PM
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1
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6052
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I am exporting my data from multiple Network Anayst VRPs to a CSV file. I am able to get the data exported to the csv file, but it keeps putting all the data in one row and overwriting it. I need to be able to advance down to the next row, but I am new to python and not sure how to do this. any help is greatly appreciated. Here's the code that writes to the CSV file. # create table - fields: From script [Block (shortBlockName), Scale (scale)], From Routes layer [stops (OrderCount), dTime (TotalTravelTime), dDistance (TotalDistance)]
CSVFile = 'F:\\Workspace\\Sandy\\GM_costAnalysis\\analysis2\\allRoutes.csv'
f = open (CSVFile, "wb")
w = csv.writer(f)
fieldNames = ['OrderCount', 'TotalTravelTime', 'TotalDistance', 'Block', 'Scale']
w.writerow(fieldNames)
recordList = []
# print "Data type: " + desc.dataElement.dataType # dataType = layer
# examine children and print their name and datatype - no children
lyrFile = arcpy.mapping.Layer(outLayerFile)
for lyr in arcpy.mapping.ListLayers(lyrFile):
if lyr.name == "Routes":
#print "Routes location: " + lyr.datasetName # returns 'Routes'
#print "Routes long Name: " + lyr.longName # returns 'TrapRoute_IA1_1K\Routes'
desc = arcpy.Describe(lyr)
# indexFields = 0
# for field in desc.fields:
# print "%-22s %s %s" % (field.name, ":", field.type) # this returns all of the fields in the routes table
cntCursor = arcpy.da.SearchCursor(lyr, "OrderCount")
for row in cntCursor:
cnt = row[0]
recordList.append(str(cnt))
print ("OrderCount: {}".format(cnt))
timeCursor = arcpy.da.SearchCursor(lyr, "TotalTravelTime")
for row in timeCursor:
t = row[0]
recordList.append(str(t))
print ("TravelTime: {}".format(t))
distCursor = arcpy.da.SearchCursor(lyr,"TotalDistance")
for row in distCursor:
dist = row[0]
recordList.append(str(dist))
print ("TravelDist: {}".format(dist))
recordList.append(str(shortBlockName))
recordList.append(str(scale))
print ("Records: {}".format(recordList)) # returns: [102, 144.19780824705958, 61.627489665697794, 'IA1', '1000']
print ("Block: {}".format(shortBlockName)) # returns: IA1
print ("Scale: {}".format(scale)) # returns: 1000
w.writerow(recordList)
w.next() # returns error - I need a way to move to the next row
f.close()
# create table - fields: From script [Block (shortBlockName), Scale (scale)], From Routes layer [(OrderCount), (TotalTravelTime), (TotalDistance)] CSVFile = 'F:\\Workspace\\Sandy\\GM_costAnalysis\\analysis2\\allRoutes.csv' f = open (CSVFile, "wb") w = csv.writer(f) fieldNames = ['OrderCount', 'TotalTravelTime', 'TotalDistance', 'Block', 'Scale'] w.writerow(fieldNames) recordList = [] # print "Data type: " + desc.dataElement.dataType # dataType = layer # examine children and print their name and datatype - no children lyrFile = arcpy.mapping.Layer(outLayerFile) for lyr in arcpy.mapping.ListLayers(lyrFile): if lyr.name == "Routes": #print "Routes location: " + lyr.datasetName # returns 'Routes' #print "Routes long Name: " + lyr.longName # returns 'TrapRoute_IA1_1K\Routes' desc = arcpy.Describe(lyr) # indexFields = 0 # for field in desc.fields: # print "%-22s %s %s" % (field.name, ":", field.type) # this returns all of the fields in the routes table cntCursor = arcpy.da.SearchCursor(lyr, "OrderCount") for row in cntCursor: cnt = row[0] recordList.append(str(cnt)) print ("OrderCount: {}".format(cnt)) timeCursor = arcpy.da.SearchCursor(lyr, "TotalTravelTime") for row in timeCursor: t = row[0] recordList.append(str(t)) print ("TravelTime: {}".format(t)) distCursor = arcpy.da.SearchCursor(lyr,"TotalDistance") for row in distCursor: dist = row[0] recordList.append(str(dist)) print ("TravelDist: {}".format(dist)) recordList.append(str(shortBlockName)) recordList.append(str(scale)) print ("Records: {}".format(recordList)) # returns: [102, 144.19780824705958, 61.627489665697794, 'IA1', '1000'] print ("Block: {}".format(shortBlockName)) # returns: IA1 print ("Scale: {}".format(scale)) # returns: 1000 w.writerow(recordList) w.next() # returns error - I need a way to move to the next row f.close()
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02-05-2015
11:11 AM
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Does anyone have experience saving route time/distance information out of a NA layer file? Any help on how to do this is greatly appreciated.
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02-04-2015
06:21 AM
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0
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I have python code that will solve a Vehicle Routing Problem and save the NA layer to a layer file. I am trying to grab the TotalTravelTime and TotalDistance from the solved Routes layer and export this along with a few other variables to a csv file. However, I can't seem to figure out how to access the routes layer. Every technique I try leaves me with a Queue.empty error. It's acting like the NA/Routes layer doesn't exist. Any help with doing this is much appreciated. I have attached my code, it didn't seem to paste in properly when I tried to insert as python script.
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01-27-2015
11:44 AM
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