import hashlib
import sys
import os


if (len(sys.argv)!=2):
    print "Usage: python %s [file]" % sys.argv[0]
    exit(0)

if not os.path.exists(sys.argv[1]):
    print "'%s' does not exist" % sys.argv[1]
    exit(0)

def md5sum(file):
    md5 = hashlib.md5()
    f = open(file, 'rb')
    for part in iter(lambda: f.read(8192), b''):
        md5.update(part)
    return md5.hexdigest()

def main():
    print ("MD5 of '%s' = " % sys.argv[1]) + (md5sum("%s" % sys.argv[1]))

if __name__=="__main__":
    main()