I have a point feature with a field 'Number', each 'Number' referring to a disk file 'Number.emf' which will be used for point symbolizing of picture mark symbol. What arcpy snippet can be used to assign each 'Number' the 'Number.emf' file for picture mark symbol? As I know, a symbology .lyr file can be constructed manually to make that, but in my case the 'Number' can be too large to match the 'Number.emf' file one by one. Can a layer file be generated with arcpy? If not, does any data available about .lyr structure, or what tool or coding language can be used for my situation?