import re

dictionary = {}
file = open('dict.txt')
for word in file:
    dictionary[word.strip()] = 1
file.close()

junkpat = re.compile(r'[",.:;!?()]')
wordpat = re.compile(r'^[a-zA-Z\']+$')

def clean_word(word):
    """Remove punctuation from a word and return the cleaned word."""
    return junkpat.sub('', word)

def is_checkable_word(word):
    """Return true if the given string is a checkable word."""
    return wordpat.match(word)

def dictionary_contains(word):
    """Return true if the given word is in the dictionary."""
    return word in dictionary or word.lower() in dictionary