When arcpy.Parameter() multiValue is True, offer ability to return a List object

EricEagle — Thu, 29 Dec 2022 17:25:02 GMT

When a Parameter holds multiple values, it would be nice to be able to catch them in a simple list object instead of a String or ValueTable.

For example, given:

param0 = arcpy.Parameter( displayName="Inputs", name="inputs", datatype="GPString", parameterType="Required", direction="Input", multiValue=True)

If the user inputs multiple strings like "Orange", "Apple", "Banana" the current options are

parameters[0].valueAsText # "Orange;Apple;Banana"

parameters[0].value # <geoprocessing value table object>

I would like to be able to return multiple values in a more idiomatic way:

parameters[0].value # yields simple list: ["Orange", "Apple", "Banana"]

Yes, it is easy to do parameters[0].valueAsText.split(";") or search through a value table, but both approaches are a needless complication. Getting a list directly from the Parameter seems to be the most straightforward, intuitive way to deal with multiple values.

Re: When arcpy.Parameter() multiValue is True, offer ability to return a List object

EricEagle — Fri, 30 Dec 2022 21:57:47 GMT

To flesh this out more, there ought to be a .valueAsTable property for when one wants to return the ValueTable object:

parameters[0].valueAsTable # returns ValueTable

idea When arcpy.Parameter() multiValue is True, offer ability to return a List object in Developers Ideas

When arcpy.Parameter() multiValue is True, offer ability to return a List object

Re: When arcpy.Parameter() multiValue is True, offer ability to return a List object