#!/usr/bin/env python

# Karl Chen

# $Id: speling.py,v 1.8 2003/02/07 08:33:07 quarl Exp $

import re

global dict

def read_dictionary(dictionary_file):
    """Load a dictionary file.

DICTIONARY_FILE should be a string filename."""
    global dict
    dict = {}
    file = open(dictionary_file)
    while 1:
        line = file.readline()
        if not line: break
        dict[line.split('\n')[0]] = 1

def read_file(file):
    """Reads a file and returns a string of its contents."""
    return ''.join(open(file).readlines())

def check_word(word):
    """Returns true if a word is spelled correctly."""
    return dict.get(word)

def tokenize_text(text):
    """Tokenize a block of text into a list of words.

Input TEXT is any string. Returns a list of words."""
    words = re.split('[^A-Za-z]+', text)
    if not words: return None
    if words and words[0] == '': words = words[1:]
    if words and words[-1] == '': words = words[0:-1]
    return words