I'm building a Python toolbox with a tool which calls specific functions from a custom module.
The main input parameter for this tool is a multivalue list of raster layers.
In the execute block of my tool, I use parameter.valueAsText to read in said parameter, as normal, and then feed it into a custom module function as follows:
output = parameters.valueAsText input = parameters.valueAsText function = parameters.valueAsText functionname = "Local" + function option = parameters.valueAsText expression = parameters.valueAsText newGrid = getattr(localfuncs,functionname)(input,option,expression) newGrid.save(output)
In this case, I've tested it with one custom function (corresponding to 'functionname'):
def LocalMean(input,option,expression): import arcpy newGrid = arcpy.sa.CellStatistics(input,"MEAN") return newGrid
The trouble is that the 'input' (multivalue read in as text) ends up being a semicolon-delimited string of file names, and the function in the custom module can't seem to convert it back to a list of raster layers for Cell Statistics to actually process. As a result I get this ERROR 000732:
Script failed because: ERROR 000732: Input Raster: Dataset Development;Vegetation;Hydrology;Elevation does not exist or is not supported at this location:
I've tried reading in 'input' with .values instead of .valueAsText, so it comes in as a list, but then I get the error that 'cannot concatenate 'str' and 'list' objects' in the getattr line.
Any ideas what I can do about this?
- I know this overall structure may seem unnecessarily complicated; but it's a key part of the bigger project. I'm not attached to specifically using getattr here, but solutions which preserve the basic structure, namely calling functions from a custom module using a string of the function's name, would be ideal