how can we make a python program continuously listen for audio

I am trying to make a virtual assistant in python, and I want it to continuously listen for audio I tried this:

import speech_recognition as sr
def get_audio():
    r = sr.Recognizer()
    with sr.Microphone() as source:
        r.adjust_for_ambient_noise(source)
        audio = r.listen(source)
        text = ""
        try:
            said = r.recognize_google(audio)
        except:
            pass
    return text.lower()

while True:
    text += get_audio()
    print(text)

but I noticed that there are gaps in between so I need help to find a method via which the program is listening continuously without any gaps.