如何将PyTTSx的输出保存到wav-fi

Question

我正试图找到一个解决方案，为什么我的代码不能正常工作。我用的是Recording synthesized text-to-speech to a file in Python的溶液，但对我来说有点不管用。问题是为什么两个方法/函数text-to-wav和所有的text-to-u文件对我都不起作用。

import json
import pyttsx
from openpyxl import load_workbook
import subprocess

class Ver2ProjectWithTTS(object):

    def __init__(self):
        self.list_merge = []

    def do_the_job(self):
        self.read_json_file()
        self.read_xml_file()
        #self.say_something()
        self.all_texts_to_files()

    def read_json_file(self):
        with open("json-example.json", 'r') as df:
            json_data = json.load(df)
            df.close()
        for k in json_data['sentences']:
            text_json = k['text']
            speed_json = int(k['speed'])
            volume_json = float(k['volume'])
            dict_json = {'text': text_json, 'speed': speed_json, 'volume': volume_json}
            self.list_merge.append(dict_json)

    def read_xml_file(self):
        tree = et.parse('xml-example.xml')
        root = tree.getroot()
        for k in range(0, len(root)):
            text_xml = root[k][0].text
            speed_xml = int(root[k][1].text)
            volume_xml = float(root[k][2].text)
            dict_xml = {'text': text_xml, 'speed': speed_xml, 'volume': volume_xml}
            self.list_merge.append(dict_xml)

    def say_something(self):
        for item in self.list_merge:
            engine = pyttsx.init()
            engine.getProperty('rate')
            engine.getProperty('volume')
            engine.setProperty('rate', item['speed'])
            engine.setProperty('volume', item['volume'])
            engine.say(cleared_text)
            engine.runAndWait()

    def text_to_wav(self, text, file_name):
        subprocess.call(["espeak", "-w"+file_name+".wav", text])

    def all_texts_to_files(self):
        for item in self.list_merge:
            cleared_text = self.clear_text_from_underscores(item['text'])
            self.text_to_wav(cleared_text, item['text'])

if __name__ == '__main__':
    a = Ver2ProjectWithTTS()
    a.do_the_job()

此处的错误代码：

#In my project:
line 91, in <module> a.do_the_job()
line 21, in do_the_job self.all_texts_to_files()
line 85, in all_texts_to_files self.text_to_wav(cleared_text, item['text'])
line 80, in text_to_wav subprocess.call(["espeak", "-w"+file_name+".wav", text])
#in subprocess:
line 523, in call return Popen(*popenargs, **kwargs).wait()
line 711, in __init__ errread, errwrite)
line 959, in _execute_child startupinfo)
WindowsError: [Error 2] The system cannot find the file specified