Python，文本到语音，无效语法，使用空闲edi

Question

我遵循了Youtube上关于如何使用python进行TextToSpeech的教程，出现了以下错误

import re
import wave
import pyaudio
import _thread
import time

class TextToSpeech:

CHUNK = 1024

def __init__(self, words_pron_dict:str = 'cmudict-0.7b.txt'):
    self._l = {}//Error right here ^
    self._load_words(words_pron_dict)

def _load_words(self, words_pron_dict:str):
    with open(words_pron_dict, 'r') as file:
        for line in file:
            if not line.startswith(';;;'):
                key, val = line.split('  ',2)
                self._l[key] = re.findall(r"[A-Z]+",val)

def get_pronunciation(self, str_input):
    list_pron = []
    for word in re.findall(r"[\w']+",str_input.upper()):
        if word in self._l:
            list_pron += self._l[word]
    print(list_pron)
    delay=0
    for pron in list_pron:
        _thread.start_new_thread( TextToSpeech._play_audio, (pron,delay,))
        delay += 0.145

def _play_audio(sound, delay):
    try:
        time.sleep(delay)
        wf = wave.open("sounds/"+sound+".wav", 'rb')
        p = pyaudio.PyAudio()
        stream = p.open(format=p.get_format_from_width(wf.getsampwidth()),
                        channels=wf.getnchannels(),
                        rate=wf.getframerate(),
                        output=True)

        data = wf.readframes(TextToSpeech.CHUNK)

        while data:
            stream.write(data)
            data = wf.readframes(TextToSpeech.CHUNK)

        stream.stop_stream()
        stream.close()

        p.terminate()
        return
    except:
        pass

if __name__ == '__main__':
tts = TextToSpeech()
while True:
    tts.get_pronunciation(input('Enter a word or phrase: '))

错误是“Invalid Sytanx”，冒号就在顶部“str”之前。我不确定我做错了什么。我使用IDLE作为编辑器，这个脚本需要pyaudio，我已经安装了它，它还需要文档“cmudict-0.7b.text”，我也有这个文档

我尝试过将文件名直接复制到代码中，添加括号将txt文件名所在的“a”改为“no”。如果有人能在这件事上帮助我，让我知道我做错了什么，我将不胜感激

我使用的是python2.7

谢谢