# Import system modules  

import arcpy

from arcpy import env

from arcpy.sa import *

# Input data source

arcpy.env.workspace = "e:/ncold/"

arcpy.env.overwriteOutput = True

# Set output folder

OutputFolder = r"E:\nc"

# Loop through a list of files in the workspace

NCfiles = arcpy.ListFiles("*.nc")

for filename in NCfiles:
    print("Processing: " + filename)

    inNCfiles = arcpy.env.workspace + "/" + filename

    fileroot = "npr" + filename[23:31]

    TempLayerFile = "PM25"

    outRaster = OutputFolder + "/" + fileroot

    # Process: Make NetCDF Raster Layer

    arcpy.MakeNetCDFRasterLayer_md(inNCfiles, "PM25", "lon", "lat", TempLayerFile, "", "", "BY_VALUE")

    # Process: Copy Raster

    arcpy.CopyRaster_management(TempLayerFile, outRaster + ".tif", "", "", "", "NONE", "NONE", "")

print "***DONE!!!"