Regular Expression in Python

The following is a Python snippet to do regular expression. First it reads a file passed as an argument, the it goes to a for-loop for each line and do string regular-expression search

#!/usr/bin/python

import sys # for sys.argv, etc.
import re  # regular expression

if (len(sys.argv) > 1):
    filename = sys.argv[1]
else:
    print sys.argv[0], " "
    sys.exit(0)


with open(filename, 'r') as f:
    #f.read()
    for line in f:
        pattern = re.compile(r"print (.*)")
        match = pattern.search(line)
        if match:
            print "print is used to print '", match.group(1), "'"

~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ readfile.py 17,3-9 All "readfile.py" 21L, 386C