topic Script Property Value list referencing a filename list in a directory in Python Questions

Script Property Value list referencing a filename list in a directory

andrewtucker — Thu, 30 Aug 2012 22:31:23 GMT

Is there anyway that my value list for a sys.argv could be a dynamic list of filenames from a directory?

I want the user to be able to only select files that exist and automatically include new files to the list as I create them.

The filename forms part of an appended text file that is ude by an external process.

Thanks in advance

Andrew Tucker
HVP Plantations
Victoria
Australia

Re: Script Property Value list referencing a filename list in a directory

JakeSkinner — Fri, 31 Aug 2012 12:33:58 GMT

Hi Andrew,

If you are using your script within a toolbox you can do this using the Tool Validation tab. You would set a parameter (i.e. Input) under the Parameters tab of the script's Properties. The Data Type for this parameter would be 'String'. You can then update the initializeParameters function with the following:

def initializeParameters(self):     arcpy.env.workspace = r"C:\temp\python\test.gdb"     list = []     lstFCs = arcpy.ListFeatureClasses("*")     for fc in lstFCs:        list.append(fc)     stringFilter = self.params[0].filter     stringFilter.list = list     return

You will want to change the 'arcpy.env.workspace' to your desired workspace. You will also need to update 'arcpy.ListFeatureClasses' if you are working with another data type (i.e. rasters, tables).

Re: Script Property Value list referencing a filename list in a directory

andrewtucker — Sat, 11 Dec 2021 09:31:01 GMT

Hi Andrew,

If you are using your script within a toolbox you can do this using the Tool Validation tab. You would set a parameter (i.e. Input) under the Parameters tab of the script's Properties. The Data Type for this parameter would be 'String'. You can then update the initializeParameters function with the following:
def initializeParameters(self):
    arcpy.env.workspace = r"C:\temp\python\test.gdb"
    list = []
    lstFCs = arcpy.ListFeatureClasses("*")
    for fc in lstFCs:
       list.append(fc)
    stringFilter = self.params[0].filter
    stringFilter.list = list
    return
You will want to change the 'arcpy.env.workspace' to your desired workspace. You will also need to update 'arcpy.ListFeatureClasses' if you are working with another data type (i.e. rasters, tables).

Thanks very much!

I'll give that a try now.

EDIT: Works like a charm!