Pyttsx3 Account for punctuation

Question

I was wondering if it was possible to detect how long a period takes in pyttsx3, I'm trying to build a live subtitler, that gets the script and then basically provides the amount of time each word lasts for. (english isnt first language, so script might not have right logic.)

    def count_syllables(self, word: str):
        vowels = "aeiouy"
        count = 0
        prev_char_was_vowel = False

        for char in word.lower():
            if char in vowels:
                if not prev_char_was_vowel:
                    count += 1
                prev_char_was_vowel = True
            else:
                prev_char_was_vowel = False

        if len(word) == 1:
            count = 1

        return count

also new to stackoverflow, so sorry if there are any errors.