Voice recognition with speech_recognition and google speech to text API

VoiceRecognition.py

import speech_recognition

recognizer = speech_recognition.Recognizer()

with speech_recognition.Microphone() as src:
    try:
        audio = recognizer.adjust_for_ambient_noise(src)
        print("Threshold Value After calibration:" + str(recognizer.energy_threshold))
        print("Please speak:")
        audio = recognizer.listen(src)
        speech_to_txt = recognizer.recognize_google(audio,language="ko-KR").lower()
        print(speech_to_txt)
    except Exception as ex:
        print("Sorry. Could not understand.")
        print("err name: " + str(ex))

if (speech_to_txt == "안녕하세요"):
    print("답변: 네 저도 안녕하세요")