Splitting Lines - Answer to exercise 2

import sys

lines = open( sys.argv[1], "r" ).readlines()

# print our own header
print "Make   Premium($)   Insurance_class"

# skip the header line (start at 1 rather than 0)
for i in range( 1, len(lines) ):
    line = lines[i].rstrip()
    words = line.split(",")

    if len(words) >= 4:
        print "%s  %s  %s" % (words[0], words[2], words[3])