hdu

#! python
import os
import sys

#### Read the file size
def fileSize (file_name ):
        if (os.path.exists(os.path.abspath(file_name)) and os.path.getsize(file_name)>0):
                print "{} {} bytes".format(os.path.abspath(file_name),os.path.getsize(file_name))
                return os.path.getsize(file_name)
        else:
                return 0
############# Main script
def main(dir_name):
        total_size = 0
        for root,dir,file_names in os.walk(dir_name):
                for file_name in file_names:
                        file_wanted=os.path.join(root,file_name)
                        try:
                                total_size += fileSize(file_wanted)
                        except Exception,e:
                                print str(e)
        #print "Total " + str(total_size) + " bytes"
        return (str(total_size))

########## Main Starts here ...
print "Total " + main(sys.argv[1]) + " bytes "