I have over 200 ascii files, and a .lyr file for the classification I wish to set. I have used the following in the python window, but it is taking HOURS to cycle through. There must be a better way to do this, can anyone point me to a quicker / better solution?
>>> import arcpy
>>> mxd = arcpy.mapping.MapDocument("CURRENT")
>>> df = arcpy.mapping.ListDataFrames(mxd, "*") 
>>> lyrSource = r"Z:\1393_HANFORD_FY2016\062_FY2016_100_Areas_PT_Rpt\GIS\CrVI_ASC.lyr"
>>> for lyr in arcpy.mapping.ListLayers(mxd, "*.asc",df):
Follow up: The python window shows:
Succeeded at Fri Mar 04 10:..... (Elapsed Time 0.06 seconds)
but this takes many minutes to pop up.
Evidently the process itself is quite fast, but the sequential process is glacially slow.