topic Re: How to iterate over multiple workspace inputs in tool validation in Python Questions

How to iterate over multiple workspace inputs in tool validation

MattHowe — Thu, 26 Aug 2021 12:17:22 GMT

I have a tool that has a workspace parameter and accepts multiple values. In the tool validation script, I would like to list all feature classes found within all chosen workspaces in the second parameter.

How do I iterate over the workspaces in the first parameter?

def updateParameters(self): # Modify parameter values and properties. # This gets called each time a parameter is modified, before # standard validation. if self.params[0].altered: # something like below ? for ws in self.params[0].split(";"):

Re: How to iterate over multiple workspace inputs in tool validation

DanPatterson — Thu, 26 Aug 2021 13:39:28 GMT

Walk—ArcGIS Pro | Documentation

Listing things using arcpy

should pretty well cover the things you are looking for. ListWorkspaces, ListFeatureclasses in conjunction with Walk

Re: How to iterate over multiple workspace inputs in tool validation

MattHowe — Thu, 26 Aug 2021 13:43:17 GMT

Cheers Dan. Figured it out.

def updateParameters(self): # Modify parameter values and properties. # This gets called each time a parameter is modified, before # standard validation. self.params[1].filter.list = [] if self.params[0].altered: if self.params[0].value: fcs = [] ws = self.params[0].values for item in ws: arcpy.env.workspace = item data = arcpy.da.Walk(item, datatype="FeatureClass") for dirpath, dirnames, filenames in data: for filename in filenames: fcs.append(filename) self.params[1].filter.list = fcs return

It was the '.values' property of the multiple value parameter I was missing.