Calculate the percentage completed while processing a input file using carriage return

percent_calculator

    import sys
    import os
    from time import sleep
     
    path = "text"
    file_size = os.stat(path).st_size
    f = open(path, 'r', 1)
    bytes_read = 0
    for line in f:
        bytes_read += len(line)
        percent = bytes_read * 100 / file_size
        sys.stdout.write("\rpercentage: " + str(percent) + "%")
        sys.stdout.flush()
        sleep(1)
    print
    print "bytes_read:", bytes_read
    print "file_size:", file_size
    
    #  Ref:https://evilzone.org/scripting-languages/%28python%29-problem-with-percentage-completed-progress/