Syntax error using ArcPy Spatial Analyst module in Python

JessicaSorrell — Sun, 14 Dec 2014 21:07:33 GMT

I'm very new to using python and figure I'm missing something obvious in the following script. I keep getting a "syntax error" message no matter how much I fiddle around with the first few lines. I think it has something to do with calling the spatial analyst module into python while checking out the spatial analyst extension. Any help would be greatly appreciated!

#Script takes an input DEM raster and delineates watershed boundaries based on

# flow direction and accumulation

# Import arcpy module

import arcpy

from arcpy.sa import *

arcpy.env.overwriteOutput = True

# Check out the Spatial Analyst extension

arcpy.CheckOutExtension("Spatial")

#Specify the input raster

inDEM = arcpy.GetParameterAsText(0)

#Specify the input coordinate system

spatialReference = arcpy.GetParameterAsText(1)

#Specify the minimum number of cells that are assumed to represent a stream

# (cell threshold)

inMin = arcpy.GetParameterAsText(2)

Try:

# Process: Project Raster

arcpy.ProjectRaster_management(inDEM, projectDEM, spatialReference)

# Process: Fill

fillDEM = Fill(projectDEM)

# Process: Flow Direction

flowDir = FlowDirection(fillDEM, "NORMAL")

# Process: Flow Accumulation

flowAccum = FlowAccumulation(flowDir)

# Process: Raster Calculator

outRaster = RasterCalculator((flowAccum > inMin))

# Process: Raster to Polyline

arcpy.RasterToPolyline_conversion(outRaster, polyLines, "ZERO", "0", "SIMPLIFY", "VALUE")

# Process: Feature Vertices To Points

arcpy.FeatureVerticesToPoints_management(polyLines, lineVertices, "END")

# Process: Watershed

outWatershed = Watershed(flowDir, lineVertices)

# Process: Raster to Polygon

arcpy.RasterToPolygon_conversion(outWatershed, watershedPolygons, "SIMPLIFY", "VALUE")

# Check in the Spatial Analyst extension

arcpy.CheckInExtension("Spatial")

#error handling

except:

arcpy.AddError("Script failed to write successfully")

arcpy.AddMessage(arcpy.GetMessages())

Re: Syntax error using ArcPy Spatial Analyst module in Python

JoshuaBixby — Sun, 14 Dec 2014 21:31:40 GMT

Posting code with syntax highlighting and numbers is useful, as well as specific error messages. For syntax highlighting, click the 'Use advanced editor' link in the upper right corner of the question/reply.

Do you know whether the Spatial Analyst extension is being correctly checked out? What is the return value of checking out the license?

Re: Syntax error using ArcPy Spatial Analyst module in Python

Luke_Pinner — Sun, 14 Dec 2014 22:33:20 GMT

Your Try: statement is capitalised, it should be lower case try:

Re: Syntax error using ArcPy Spatial Analyst module in Python

DanPatterson_Retired — Sun, 14 Dec 2014 22:34:28 GMT

# Check in the Spatial Analyst extension

arcpy.CheckInExtension("Spatial")

these 2 lines are incorrectly dedented, they should be within the try block ... also 'try' is lower case

And do format the code using the advanced editor's syntax highlighting

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Syntax error using ArcPy Spatial Analyst module in Python

Re: Syntax error using ArcPy Spatial Analyst module in Python

Re: Syntax error using ArcPy Spatial Analyst module in Python

Re: Syntax error using ArcPy Spatial Analyst module in Python