NearAnalysis | Python Fiddle

#-------------------------------------------------------------------------------
# Name:        module1
# Purpose:
#
# Author:      David Craig
#
# Created:     27/01/2017
# Copyright:   (c) dcraig 2017
# Licence:     <your licence>
#-------------------------------------------------------------------------------
import arcpy
from arcpy import env

"""Python Toolbox Implementation"""

class Toolbox(object):
    def __init__(self):
        self.label = "isoRoadsToolbox"
        self.alias = ""
        #Tool List
        self.tools = [NearAnalysis]

class NearAnalysis(object):
    def __init__(self):
        self.label = "Near Analysis"
        self.description = "Takes the isolated roads files and determines identifies " +\
                           "how far each arc is from its the closest road as well as " +\
                           "a frequency count of dangles on each road arc - 2 means " +\
                           "a single isolated arc, 1 means the arc is on the end of " +\
                           "a multi-arc isolated road, 0 means the arc is not an endpoint"
        self.canRunInBackground = False
    def getParameterInfo(self):
        inWorkspace = arcpy.Parameter(
            displayName = "Workspace Database",
            name = "inWorkspace",
            datatype = "DEWorkspace",
            parameterType = "Required",
            direction = "Input"
        )
        ngdAL = arcpy.Parameter(
            displayName = "NGD_AL File",
            name = "ngdAL",
            datatype = "DEFeatureClass",
            parameterType = "Required",
            direction = "Input"
        )
        isoRoad = arcpy.Parameter(
            displayName = "Isolated Road File",
            name = "isoRoad",
            datatype = "DEFeatureClass",
            parameterType = "Required",
            direction = "Input"
        )
        networkRoads = arcpy.Parameter(
            displayName = "Networked Roads File",
            name = "networkRoads",
            datatype = "DEFeatureClass",
            parameterType = "Required",
            direction = "Input"
        )
        parameters = [inWorkspace, ngdAL, isoRoad, networkRoads]

return parameters

def isLicensed(self):
        return True
    def updateParameters(self, parameters):
        return
    def updateMessages(self, parameters):
        return
    def execute(self, parameters,messages):
        messages.addMessage("Running Script...")
        danglePts = parameters[2].valueAsText + "Points"
        arcpy.FeatureVerticesToPoints_management(parameters[2].valueAsText, danglePts, "DANGLE")
        messages.addMessage("Dangles found!")
        return

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