In this article i will explain you step by step how you can create voice assistant using python

Step 1: Install necessary python library which gonna help in creating voice assistant in python

• Install pyttsx3 this is text to speech conversion library in python

   pip install pyttsx3

• Install SpeechRecognition library this library will recognize our voice and convert to text

   pip install SpeechRecognition

• Install webbrowser library this library helps in searching from google

   pip install webbrowser

• Install pyaudio this library is dependency of SpeechRecognition API

  #To install on linux ubuntu

  #To install pyaudio if you are using linux ubuntu run this command
   sudo apt-get install portaudio19-dev python-pyaudio

   #After running above command run the following command
   sudo pip3 install PyAudio

   # To install on windows and macos user
   pip3 install pyaudio

Step 2: Once all the library installed successfully copy paste following code

• Importing python library and initilizing pytsx3

   #importing all the required library
   import pyttsx3
   import speech_recognition as sr
   import webbrowser
  
   #initializing pyttsx3 and setting voice language as english
   engine = pyttsx3.init()
   voices = engine.getProperty('voices')
   en_voice_id = "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Speech\Voices\Tokens\TTS_MS_EN-US_ZIRA_11.0"
   engine.setProperty('voice', en_voice_id)

• Defining function which we would call on the basis of required work to be done

     #this function would turn text to audio using pyAudio engine which we have initialized above
     def audioOutput(audio):
        engine.say(audio)
        engine.runAndWait()
  
     #this function would take audio input and convert it to text and return that text
     def audioInput():
         r = sr.Recognizer()
         with sr.Microphone() as source:
            print("Listening...")
  	         r.pause_threshold = 1
  	         audio = r.listen(source)
         try:
  	         print("Recognizing...")
  	         query = r.recognize_google(audio, language ='en-in')
  	         print(f"User said: {query}\n")
  
        except Exception as e:
  	         print(e)
  	         print("Unable to Recognize your voice.")
  	         return "None"
        return query
  
     #this function would be called first to welcome and greet user
     def greetUser():
         audioOutput("Hi, I am your Assistant, How may i help you today?")
  
  
     if __name__ == '__main__':
         greetUser()
         while True:
            query = audioInput().lower()
            if 'search on google' in query
                speak("Searching on google\n")
  		          webbrowser.open("google.com")