[Tutor] optparse

[Matt Herzog]

Hi All.

I want to write a script that will emulate grep to some extent. This is just an exercise for me. I want to run the script like this:

./pythongrep directory searchstring

Just like grep, I want it to print: filename, instance_of_match

As of now, the script can't find anything I tell it to look for. It prints, "None." Thanks for any advice.


import optparse
import os
import re

def main():

    p = optparse.OptionParser(description="Python grepper", prog="greppar", version="0.1", usage="usage: %prog directory regex")

    options, arguments = p.parse_args()
    if len(arguments) == 2:
        directory = arguments[0]
        regex = arguments[1]

        s = re.compile(regex)

        for filename in os.listdir(directory):
            result = re.match(s, filename)
    print result

    else:
        p.print_help()

if __name__ == '__main__':
    main()



-- 
I fear you speak upon the rack,
Where men enforced do speak anything.

- William Shakespeare