Making Parameter List Update/Refresh in Python Toolbox?

Question

I am using a python toolbox in ArcGIS 10.2.2 and want a drop down list of all the versions for the person reconciling to choose from. (And I do not want to include dbo.DEFAULT and DS.Draft). But this list is populated right after a script is run to create the editor's version and if the Python Toolbox isn't refreshed manually in ArcMap, then this newest version doesn't show up in the list.

I looked at updateParameters, but either I was writing it incorrectly or it doesn't work because the user isn't actually changing a parameter that triggers it.

Regardless, I want to refresh the list at the time the script is run.

Can I use updateParameters or do a reload or something else snazzy that will make the list repopulate?

The other thing is I could switch the order of the parameters and having the user type their initials first which would then be a user action that could trigger the updateParmaters, but not sure this is the issue and seems convoluted.

import sys, arcpy, os
class Toolbox(object):
 def __init__(self):
 """Define the toolbox (the name of the toolbox is the name of the
 .pyt file)."""
 self.label = "EGDB Data Steward Version"
 self.alias = ""
 # List of tool classes associated with this toolbox
 self.tools = [Prep]
class Prep(object):
 def __init__(self):
 """Define the tool (tool name is the name of the class)."""
 self.label = "Prepare for Reconcile and Post"
 self.description = "Create grandfather version of editor for DS"
 self.canRunInBackground = False
 def getParameterInfo(self):
 #Define parameter definitions
 params = [] 
 # First parameter
 param0 = arcpy.Parameter(
 displayName="Editor's Version Name",
 name="editor_full_versionname",
 datatype="GPString",
 parameterType="Required",
 direction="Input")
 param0.filter.type = "ValueList"
 param0.filter.list = [v.name for v in arcpy.da.ListVersions(r"\\inpyosegis05\DatabaseConnectionFiles\DataStewardsOnly\YOSEGIS_VectorYOSE_DS.sde")
 if v.name not in ["dbo.DEFAULT", "DS.Draft"]] #Take DEFAULT and Draft off the drop-down list as choices.
 # Second parameter
 param1 = arcpy.Parameter(
 displayName="Data Steward's Initials",
 name="DS_initials",
 datatype="GPString",
 parameterType="Required",
 direction="Input")
 params = [param0, param1]
 return params
def isLicensed(self):
 """Set whether tool is licensed to execute."""
 return True
def updateParameters(self, parameters):
 """Modify the values and properties of parameters before internal
 validation is performed. This method is called whenever a parameter
 has been changed."""
 param0 = arcpy.Parameter(
 displayName="Editor's Version Name",
 name="editor_full_versionname",
 datatype="GPString",
 parameterType="Required",
 direction="Input")
 param0.filter.type = "ValueList"
 param0.filter.list = [v.name for v in arcpy.da.ListVersions(r"\\inpyosegis05\DatabaseConnectionFiles\DataStewardsOnly\YOSEGIS_VectorYOSE_DS.sde")
 if v.name not in ["dbo.DEFAULT", "DS.Draft"]] #Take DEFAULT and Draft off the drop-down list as choices.
 return 

Answer 1

Try the following:

def updateParameters(self, parameters):
 if parameters[0].value:
 parmeters[0].filter.list = [v.name for v in arcpy.da.ListVersions(r"\\inpyosegis05\DatabaseConnectionFiles\DataStewardsOnly\YOSEGIS_VectorYOSE_DS.sde") 
 if v.name not in ["dbo.DEFAULT", "DS.Draft"]]
 return

• Vanessa: Hi Barbarossa, thank you but that didn't work either. Any other ideas?