primitive file reader and text 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 after a prompt to 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 '----------------->loading search function..'
    def Find(pat, text):
        match = re.search(pat, text)
        if match:
            print match.group()
        else:
            print 'not found'
    x = raw_input('enter search pattern-->')
    Find(x, text)
    f.close()

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

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