Python: Simulating Linux command cat

Simulates the Linux cat command, printing the file name entered from the command line

#!/usr/bin/python#filename:cat.pyhelpstring = "This program prints files to the standard output. Any number of the files can be specified. Options include:--version:prints The version number--help:display this "import sysdef ReadFile (filename):    ' ' Print a file to the standard output.    ' f = file (filename) while    True: line        = F.readline ()        if len [line] = = 0: Break            print Line        ,    f.close () #Script start from HEREif Len (SYS.ARGV) < 2:    print ' No action specified. '    Sys.exit () If Sys.argv[1].startswith ('--'):    option = sys.argv[1][2:]    if option = = ' version ' or option = = ' V ': C12/>print ' Version 1.2 '    elif option = = ' help ' or option = = ' h ':        print helpstring    else:        print ' Unknow n option. '    Sys.exit () Else: for    filename in sys.argv[1:]:        readfile (filename) print ' Done '

Python: Simulating Linux command cat