# short function to easily find matches for crossword puzzles

def match():
    import re # get regular expression package
    from nltk_lite.corpora import words  #list of 800+ common words
    wordlist = list(words.raw())
    again = 'y'
    while again[0] != 'n':  #check first letter of response
        pat = raw_input("Enter pattern without quotes: ")
        confirm = raw_input("Confirm: " + pat + " ?(y/n) ")
        if confirm[0] == 'y':
            # select the words that match the pattern
            result = [w for w in wordlist if re.match(pat + '$',w)]
            print str(len(result)) + " matches found."
            ct = raw_input("How many do you want to see?  ")
            ct = int(ct)
            if ct > 0:
                print result[: ct]  #illustrates use of a slice
        again = raw_input("Continue? (y/n)  ")


# Call match() if this file is executed at top level
if __name__ == "__main__":
	match()