Python script filter doesn't have the expected behavior

[KarolDuarte]

Hello, everyone!

I'm trying to build a new toolbox with one single python scrit to be shared internally. It's a simple script to help export layouts with our specified needs more easely.

That said, I have created a validation script for adding a filter to my layout parameter. The idea is that, first, the user will select the project were the layout are, and then the filter updates with all the layouts available inside that project.

It was succesfull when the project from which I wanted to export the layout was oppened. hower, when I tried running the script from a blank project, selecting one that I had worked on previously, the filter did not show. Is there a way to solve this?

Here's my code:

class ToolValidator(object😞

    def __init__(self):

        self.params = arcpy.GetParameterInfo()

    def initializeParameters(self):

        if self.params[0].altered:

            project = self.params[0].value

            aprx = arcpy.mp.ArcGISProject(project)

            layouts_list = aprx.listLayouts()

            self.params[1].filter.list = layouts_list

       return

    def updateParameters(self):

        return

    def updateMessages(self):

        return

[KarolDuarte]

So, I figured out a workaround (probably not the best, but it worked for me).

My layout parameter was set as "type layout". So, instead, I configured as "type string", and used the layouts' names for the filter list.
Inside the script I compare the selected names back with the layouts names inside the project, and export those selected.

Here:

class ToolValidator(object😞

    def __init__(self):

        self.params = arcpy.GetParameterInfo()

    def initializeParameters(self):

        resolutions = [100, 150, 200, 250, 300, 600]

        self.params[3].filter.list = resolutions

        qualities = ['BEST', 'BETTER', 'NORMAL', 'FASTER', 'FASTEST']

        self.params[4].filter.list = qualities

        return

    def updateParameters(self):

        if self.params[0].altered:

            project = self.params[0].value

            aprx = arcpy.mp.ArcGISProject(project)

            layouts_list = aprx.listLayouts()

            layouts_filter_list = [l.name for l in layouts_list]

            self.params[1].filter.list = layouts_filter_list

        return

    def updateMessages(self):

        return