Discussion

ListPrinterNames always returns a list object even if only one printer name is returned. In order to return a single printer, an index value must be used on the list (e.g., printer = arcpy.mapping.ListPrinterNames()[0]). For loops on a list provide an easy mechanism to iterate through each item in the list (e.g., for printer in arcpy.mapping.ListPrinterNames():).

ListPrinterNames is an easy way to identify the names of the printers currently available to the local computer. These string values can then be used as input parameters with the PrintMap() function or the printPages method on the DataDrivenPages object.

ListPrinterNames ()

import arcpy
for printerName in arcpy.mapping.ListPrinterNames():
    print printerName