如何在python中进行自定义语音识别？

import speech_recognition as sr

# 创建Recognizer对象
r = sr.Recognizer()

# 从音频文件中识别语音
def recognize_speech_from_file(file_path):
    with sr.AudioFile(file_path) as source:
        audio = r.record(source)  # 读取音频文件
        try:
            text = r.recognize_google(audio, language='zh-CN')  # 使用Google语音识别引擎识别语音
            return text
        except sr.UnknownValueError:
            print("无法识别音频")
        except sr.RequestError as e:
            print("无法连接到Google语音识别服务：{0}".format(e))

# 从麦克风实时录制并识别语音
def recognize_speech_from_microphone():
    with sr.Microphone() as source:
        print("请开始说话...")
        audio = r.listen(source)  # 实时录制音频
        try:
            text = r.recognize_google(audio, language='zh-CN')  # 使用Google语音识别引擎识别语音
            return text
        except sr.UnknownValueError:
            print("无法识别音频")
        except sr.RequestError as e:
            print("无法连接到Google语音识别服务：{0}".format(e))

# 调用函数进行语音识别
file_text = recognize_speech_from_file('audio.wav')
print("音频文件识别结果：", file_text)

mic_text = recognize_speech_from_microphone()
print("麦克风实时识别结果：", mic_text)