How to use the pysle.isletool function in pysle

'truncate', False)
        wordEntryList = wordTier.entryList

    # Do the naive alignment
    for startT, stopT, label in utteranceTier.entryList:
        wordList = label.split()

        # Get the list of phones in each word
        superPhoneList = []
        numPhones = 0
        i = 0
        while i < len(wordList):
            word = wordList[i]
            try:
                firstSyllableList = isleDict.lookup(word)[0][0][0]
            except isletool.WordNotInISLE:
                wordList.pop(i)
                continue
            phoneList = [phone for syllable in firstSyllableList
                         for phone in syllable]
            superPhoneList.append(phoneList)
            numPhones += len(phoneList)
            i += 1

        # Get the naive alignment for words, if alignment doesn't
        # already exist for words
        subWordEntryList = []
        subPhoneEntryList = []
        if wordTier is not None:
            subWordEntryList = wordTier.crop(startT, stopT,
                                             "truncated", False).entryList

def simplifyPronunciation(phoneList):
    '''
    Simplifies pronunciation

    Removes diacritics and unifies vowels and rhotics
    '''
    retList = []
    for phone in phoneList:

        # Remove diacritics
        for diacritic in isletool.diacriticList:
            phone = phone.replace(diacritic, u'')

        # Unify rhotics
        if 'r' in phone:
            phone = 'r'

        phone = phone.lower()

        # Unify vowels
        if isletool.isVowel(phone):
            phone = u'V'

        # Only represent the string by its first letter
        try:
            phone = phone[0]
        except IndexError: