How do you set an output parameter (e.g. a feature set) in the execute method of a tool in a Python toolbox? I've tried setting parameters = output and arcpy.SetParameter(n, output) and neither work. For example, the following script works fine in a regular toolbox:
import arcpy
try:
arcpy.env.workspace = "in_memory"
# Get parameters
Input_Features = arcpy.GetParameterAsText(0)
Buffers = arcpy.CreateUniqueName("Buffer")
# Perform buffer
arcpy.Buffer_analysis(Input_Features, Buffers,
"100 Feet", "FULL", "ROUND", "NONE", "")
OutFeatureSet = arcpy.FeatureSet()
OutFeatureSet.load(Buffers)
arcpy.SetParameter(1, OutFeatureSet)
except Exception, ErrorDesc:
sErr = "ERROR:\n" + str(ErrorDesc)
arcpy.AddError(sErr)
But I can't get the output to work in a Python toolbox:
import arcpy
import os
class Toolbox(object):
def __init__(self):
self.label = "Runtime Tools"
self.alias = ""
# List of tool classes associated with this toolbox
self.tools = [BufferTest]
class BufferTest(object):
def __init__(self):
self.label = "Buffer Test"
self.description = "Create buffers"
self.canRunInBackground = False
def getParameterInfo(self):
params = []
param0 = arcpy.Parameter(
displayName = "Input Features",
name = "inputFeatures",
datatype = "Feature Set",
parameterType = "Required",
direction = "Input")
param0.value = os.path.join(os.path.dirname(__file__),
"FC_Templates.gdb\PointTemplate")
params.append(param0)
param1 = arcpy.Parameter(
displayName = "Buffers",
name = "buffers",
datatype = "Feature Set",
parameterType = "Derived",
direction = "Output")
params.append(param1)
return params
def execute(self, parameters, messages):
try:
arcpy.env.workspace = "in_memory"
# Get parameters
Input_Features = parameters[0].valueAsText
Buffers = arcpy.CreateUniqueName("Buffer")
# Perform buffer
arcpy.Buffer_analysis(Input_Features, Buffers,
"100 Feet", "FULL", "ROUND", "NONE", "")
OutFeatureSet = arcpy.FeatureSet()
OutFeatureSet.load(Buffers)
# parameters[1] = OutFeatureSet
arcpy.SetParameter(1, OutFeatureSet)
except Exception, ErrorDesc:
sErr = "ERROR:\n" + str(ErrorDesc)
messages.addErrorMessage(sErr)
return
What am I doing wrong? Thanks!
