Latest Contributions by TimWitt2

Hello everybody, I am creating a Python AddIn, that creates a topology, then adds a feature layer and rules to it. After I run the topology validation, I would like to add the topology to the mxd that is open. When I set arcpy.env.addOutputsToMap to True, it adds the topology but before I add the rules,  features and validation. Is there any way to add the topology once everything is done? Thanks, Tim ... View more

Hey everybody, I am creating python toolbox and one of the tools adds a bunch of fields to a feature class that the user chooses and after wards calculates those fields with values from the original feature class. I run into the issue that the field calculations can't run because the fields haven't been added yet. This is the code I use: import arcpy    class Toolbox(object):      def __init__(self):          """Define the toolbox (the name of the toolbox is the name of the .pyt file)."""          self.label = "My first python toolbox"          self.alias = "Examples"            # List of tool classes associated with this toolbox          self.tools = [Tool1]    class Tool1(object):      def __init__(self):          """Define the tool (tool name is the name of the class)."""          self.label = "Nena Street Tool"          self.description = "Example showing how to create a value table tool with drop downs"          self.canRunInBackground = False        def getParameterInfo(self):          """Define parameter definitions"""            #          # Define Parameter 0          #            # Param0 will be a FeatureLayer         param0 = arcpy.Parameter(displayName = "Your Street Layer",name="Site_layer",datatype="GPFeatureLayer",parameterType="Required",direction="Input")                   #          # Define Parameter 1          #            param1 = arcpy.Parameter(displayName = "",name="Activity_layers",datatype="GPValueTable",parameterType="Optional", direction="Input")            param1.columns=[["String","NENA Field"],["String","Your Field"]]              # This says the filter on the second column will be a value List          param1.filters[1].type="ValueList"         param1.value = "Source; Updatedate; Effective; Expire; RCL_NGUID; AdNumPre_L; AdNumPre_R; FromAddr_L; ToAddr_L; FromAddr_R; ToAddr_R; Parity_L; Parity_R"                     # This adds a dummy value to the list, this will get overwritten by the updateParameters function          param1.filters[1].list=["Please Select a street layer"]            # Create a list of parameters and return          params = [param0,param1]          return params        def isLicensed(self):          """Set whether tool is licensed to execute."""          return True        def updateParameters(self, parameters):            if parameters[0].altered:           fields = arcpy.ListFields(parameters[0].value)           mylist = []           for field in fields:              mylist.append(field.name)           parameters[1].filters[1].list = mylist         return        def updateMessages(self, parameters):          """Modify the messages created by internal validation for each tool         parameter.  This method is called after internal validation."""          return        def execute(self, parameters, messages):          """The source code of the tool."""          try:              # Some code to show that I had managed to get what I wanted intot the ValueTable                            data = parameters[1].values             arcpy.AddField_management(parameters[0].value, "Source", "TEXT", "", "", "75", "", "NULLABLE", "NON_REQUIRED", "")             arcpy.AddField_management(parameters[0].value, "DateUpdate", "DATE", "", "", "", "", "NULLABLE", "NON_REQUIRED", "")             arcpy.AddField_management(parameters[0].value, "Effective", "DATE", "", "", "", "", "NULLABLE", "NON_REQUIRED", "")             search = 'Source'             for sublist in data:               if sublist[0] == search:                 final = sublist                 mysource = final[1]                 sourceData = "[" + mysource + "]"                 arcpy.CalculateField_management(parameters[0].value, "Source", sourceData, "VB", "")                 break         except arcpy.ExecuteError:              messages.addErrorMessage(arcpy.GetMessages()) ‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍ In line 75 I add the "Source" field and in line 84 I try to calculate it, but I get the error that the "Source" field does not exist. Any help would be appreciated. Tim ... View more