100+ Python Projects Challenge 4: Check your English speech

3 min readMay 8, 2021

Someone told me that Python is very easy to learn but it’s difficult to use it to do something. So I think if we can learn Python programming by do some real projects it’ll helpful. That’s the reason I made the github repo https://github.com/zhiwehu/Python-programming-exercises several years ago and now I’m making a new one: https://github.com/zhiwehu/100_plus_Python_Projects_Challenge

Today I’m going to share with you the challenge 4:

Check your English speech

Requirements

Run the code in console using command line.
It’ll let you input a English word or sentence, then it’ll let you speak it.
It’ll record your voice using mic and check if you speak correctly. If not it’ll ask you speak it again until you speak it correctly.

What will we practice in this project?

for loop
input text
Text lower case
if conditions
functions
exception handle
SpeechRecognition package (need to install by pip install SpeechRecognition) it support these speech recognitions:
recognize_bing(): Microsoft Bing Speech
recognize_google(): Google Web Speech API
recognize_google_cloud(): Google Cloud Speech - requires installation of the google-cloud-speech package
recognize_houndify(): Houndify by SoundHound
recognize_ibm(): IBM Speech to Text
recognize_sphinx(): CMU Sphinx - requires installing PocketSphinx
recognize_wit(): Wit.ai
pyaudio package (need to install by pip install pyaudio)

A reference code

import speech_recognition as sr
def recognize_speech_from_mic(recognizer, microphone):
    '''
    Transcribe speech from recorded from `microphone`.
    :param recognizer: 
    :param microphone: 
    :return: `None` if speech could not be transcribed, otherwise a string containing the transcribed text
    '''
    print('Please read the English sentence')
    # adjust the recognizer sensitivity to ambient noise and record audio
    # from the microphone
    with microphone as source:
        recognizer.adjust_for_ambient_noise(source)
        audio = recognizer.listen(source)    # try recognizing the speech in the recording
    try:
        text = recognizer.recognize_google(audio)
    except Exception as e:
        print(e)
        text = None    return text
if __name__ == '__main__':
    # input a English word or sentence
    text = input('Please input a English word or sentence: ').strip()    # create recognizer and mic instances
    recognizer = sr.Recognizer()
    microphone = sr.Microphone()    # get your speech text
    speech_text = recognize_speech_from_mic(recognizer, microphone)    while speech_text != None and text.lower() != speech_text.lower():
        print(speech_text)
        # get your speech text
        speech_text = recognize_speech_from_mic(recognizer, microphone)    if speech_text:
        print('{} {}'.format(speech_text, '✓'))
    else:
        print('Please try the speech recognization service later or change another one.')

Run the demo

use pip install requirements.txt to install packages: pyaudio and SpeechRecognition
run it in console

python 4.py

检测英语口语

项目需求

在命令行窗口运行；
程序运行时，会让你输入一句英语，然后你需要对着麦克风读出这句英语；
程序会判断你读的对不对，如果不对会让你重读，直到读对为止。

Python编程知识点

while循环
用户输入字符串
字符串小写
条件判断
自定义函数
异常处理
SpeechRecognition 模块 (安装： pip install SpeechRecognition) it support these speech recognitions:
recognize_bing(): Microsoft Bing Speech
recognize_google(): Google Web Speech API
recognize_google_cloud(): Google Cloud Speech - 需要安装google-cloud-speech模块
recognize_houndify(): Houndify by SoundHound
recognize_ibm(): IBM Speech to Text
recognize_sphinx(): CMU Sphinx - 需要安装PocketSphinx模块
recognize_wit(): Wit.ai
pyaudio 模块 (安装： pip install pyaudio)

参考代码

import speech_recognition as sr
def recognize_speech_from_mic(recognizer, microphone):
    '''
    麦克风录音并转文字 `microphone`.
    :param recognizer: 语音识别器
    :param microphone: 麦克风
    :return: `None` 如果识别失败返回None，否则返回语音文字
    '''
    print('开始朗读')
    # 录音并去除噪音
    with microphone as source:
        recognizer.adjust_for_ambient_noise(source)
        audio = recognizer.listen(source)    # 调用语音识别，亲测微软bing国内可用，国外建议使用google
    try:
        text = recognizer.recognize_bing(audio)
    except Exception as e:
        print(e)
        text = None    return text
if __name__ == '__main__':
    # 输入
    text = input('请输入一句英语: ').strip()    # 创建语音识别器和麦克风
    recognizer = sr.Recognizer()
    microphone = sr.Microphone()    # 录音并获取文字
    speech_text = recognize_speech_from_mic(recognizer, microphone)    while speech_text != None and text.lower() != speech_text.lower():
        print(speech_text)
        speech_text = recognize_speech_from_mic(recognizer, microphone)    if speech_text:
        print('{} {}'.format(speech_text, '✓'))
    else:
        print('语音识别服务暂不可用，请稍后再试。')

运行测试

使用 pip install requirements.txt 安装模块: pyaudio and SpeechRecognition
运行

python 4.py