primitive file reader and search template

#!/usr/bin/python
#[email protected]

"""good use of primitive built in functions to process whole files.
invoked the script defines cat() takes a filename as argument opens
and reads it as a single text file then Find() function is defined
using regular expressions built in functions search() match() and group().
Find() is called with Rose and text as arguments for testing. Next step
is to prompt user for the search string pattern argument for Find()"""

import sys
import re
def cat(filename):
    f = open(filename, 'rU')
    text = f.read()
    print '----------------->your file has been opened..'
    print text,
    print '----------------->searching pattern Roses'
    def Find(pat, text):
        match = re.search(pat, text)
        if match:
            print match.group()
        else:
            print 'not found'
    Find('Rose', text)
    f.close()

#main() to dump file to screen
def main():
    cat(sys.argv[1])

#boilerplate main() call.
if __name__=='__main__':
   main()