arcgis python 获得打印机

class ToolValidator:
  """Class for validating a tool's parameter values and controlling
  the behavior of the tool's dialog."""

  def __init__(self):
    """Setup the Geoprocessor and the list of tool parameters."""
    import arcgisscripting as ARC
    self.GP = ARC.create(9.3)
    self.params = self.GP.getparameterinfo()

  def initializeParameters(self):
    """Refine the properties of a tool's parameters.  This method is
    called when the tool is opened."""
    import arcpy.mapping as MAP
    printerList = MAP.ListPrinterNames()
    if not self.params[1].Altered:
      self.params[1].Filter.List = printerList

    return

  def updateParameters(self):
    """Modify the values and properties of parameters before internal
    validation is performed.  This method is called whenever a parmater
    has been changed."""
    return

  def updateMessages(self):
    """Modify the messages created by internal validation for each tool
    parameter.  This method is called after internal validation."""
    return
===========================================

import arcpy, string
import arcpy.mapping as MAP

#Read input parameters from script tool
MXDList = string.split(arcpy.GetParameterAsText(0), ";")
printer = arcpy.GetParameterAsText(1)

#Loop through each MXD and print
for MXDPath in MXDList:
    MXD = MAP.MapDocument(MXDPath)
    MAP.PrintMap(MXD, printer)

#Remove variable reference to file
del MXD