Python语音助手如何实现文本、语音两种输入模式选择功能

• takecommand 主输入函数没有返回值：调用子输入函数后没有将结果返回，外部逻辑无法拿到用户的输入内容
• 模式选择的键盘监听逻辑存在缺陷：空循环高频调用keyboard.is_pressed既会占用过高CPU，也容易错过用户的按键触发，同时没有按键消抖逻辑，容易出现单次按键被识别为多次的问题
• 语音识别函数的递归调用存在安全隐患：识别失败时直接递归调用自身，连续多次识别失败会触发栈溢出
• 逻辑判断冗余：用于存储模式的变量本身就是布尔值，不需要额外和True/False做等值比较

import keyboard
import speech_recognition as sr
import time

# 文本输入实现
def takecommandti():
    print(" ")
    rt = input(">>")
    return rt.lower()

# 语音输入实现
def takeCommandsi():     
    r = sr.Recognizer()
    r.dynamic_energy_threshold = False
    r.energy_threshold = 4000
    r.pause_threshold = 1
    # 替换递归为循环，避免栈溢出
    while True:
        print("Listening....")
        with sr.Microphone() as source:
            r.adjust_for_ambient_noise(source)
            audio = r.listen(source)
        try:
            print("Recognizing....")
            said = r.recognize_google(audio, language='en-in')
            print(f"You Said : {said}\n")
            return said.lower()
        except sr.UnknownValueError :
            print("could not understand audio \n ~Trying Again~")
        except sr.RequestError as e:
            print(f"Could not request results, check your internet connection; {e}")
            return "None"

# 输入模式选择
input_mode_is_speech = False
print("Please Select in which input Mode you want to Use :) ")
print("1.Press 't' for Text Input Mode \n2.Press 's' for Speech Input Mode ")

while True:
    if keyboard.is_pressed('t'):
        print('You have successfully Selected : Text Input Mode')
        input_mode_is_speech = False
        # 按键消抖，避免按键残留触发后续输入
        time.sleep(0.2)
        break
    elif keyboard.is_pressed('s'):
        print('You have successfully Selected : Speech Input Mode')
        input_mode_is_speech = True
        time.sleep(0.2)
        break
    # 降低循环频率减少CPU占用
    time.sleep(0.1)

# 统一输入入口
def takecommand():
    if input_mode_is_speech:
        return takeCommandsi()
    else:
        return takecommandti()

# 测试代码，可替换为你的语音助手业务逻辑
if __name__ == "__main__":
    while True:
        user_input = takecommand()
        if user_input == "quit":
            print("退出程序")
            break
        print(f"处理输入：{user_input}")

• keyboard库需要系统级的键盘监听权限，Windows下需要用管理员身份运行IDE/终端，Linux/macOS下需要加sudo执行脚本
• 如果你需要切换输入模式，可以自行在业务逻辑中加触发重新执行模式选择的代码

内容的提问来源于stack exchange，提问作者iamDyeus