Speech To Text using IBM Watson Studio

#Python Program To Use IBM Watson
# Studio's Speech To Text Below Code
# Accepts only .mp3 Format of Audio
# File 

 
import json
from os.path import join, dirname
from ibm_watson import SpeechToTextV1
from ibm_watson.websocket import RecognizeCallback, AudioSource
from ibm_cloud_sdk_core.authenticators import IAMAuthenticator

 
# Insert API Key in place of 
# 'YOUR UNIQUE API KEY'
authenticator = IAMAuthenticator('YOUR UNIQUE API KEY') 
service = SpeechToTextV1(authenticator = authenticator)
 
#Insert URL in place of 'API_URL' 
service.set_service_url('API_URL')
 
# Insert local mp3 file path in
# place of 'LOCAL FILE PATH' 
with open(join(dirname('__file__'), r'LOCAL FILE PATH'), 
          'rb') as audio_file:
    
        dic = json.loads(
                json.dumps(
                    service.recognize(
                        audio=audio_file,
                        content_type='audio/flac',   
                        model='en-US_NarrowbandModel',
                    continuous=True).get_result(), indent=2))

# Stores the transcribed text
str = ""

while bool(dic.get('results')):
    str = dic.get('results').pop().get('alternatives').pop().get('transcript')+str[:]
     
print(str)