topic Re: Purpose of "#" value in arcpy.AddRastersToMosaicDataset in Python Questions

Purpose of "#" value in arcpy.AddRastersToMosaicDataset

LanceCole — Tue, 30 Aug 2022 11:35:05 GMT

I am updating some raster data and related processing scripts. In the code reference guide Add Rasters To Mosaic Dataset (Data Management) a value of "#" is utilized for some parameters. What is the intent of this value vs ""? Does it indicate to use the default value for the parameter?

import arcpy arcpy.management.AddRastersToMosaicDataset( "c:/data/AddMD.gdb/md_landsat", "Landsat 7 ETM+", "c:/data/landsat7etm", "UPDATE_CELL_SIZES", "UPDATE_BOUNDARY", "UPDATE_OVERVIEWS", "2", "#", "#", "GCS_WGS_1984.prj", "*.tif", "SUBFOLDERS", "EXCLUDE_DUPLICATES", "NO_PYRAMIDS", "NO_STATISTICS", "BUILD_THUMBNAILS", "Add Landsat L1G", "FORCE_SPATIAL_REFERENCE", "NO_STATISTICS", "", "USE_PIXEL_CACHE", r"C:\test\cachelocation")

Re: Purpose of "#" value in arcpy.AddRastersToMosaicDataset

Anonymous User — Tue, 30 Aug 2022 13:17:01 GMT

"#" is generally seen when exporting geoprocessing history/ models to python and says no parameter was set. It's performs the same as '' or None.

Re: Purpose of "#" value in arcpy.AddRastersToMosaicDataset

DanPatterson — Tue, 30 Aug 2022 16:24:27 GMT

The alternative is to use "named" parameters rather than "positional"

Obviously more useful if you only want to specify a couple of optional parameters and you are using defaults between them.

import arcpy arcpy.management.AddRastersToMosaicDataset( in_mosaic_dataset="c:/data/AddMD.gdb/md_landsat", raster_type="Landsat 7 ETM+", input_path="c:/data/landsat7etm", maximum_pyramid_levels="2", spatial_reference="GCS_WGS_1984.prj", filter="*.tif", duplicate_items_action="EXCLUDE_DUPLICATES", operation_description="Add Landsat L1G", force_spatial_reference="FORCE_SPATIAL_REFERENCE", "NO_STATISTICS", "", enable_pixel_cache="USE_PIXEL_CACHE", cache_location=r"C:\test\cachelocation" )