createWav.py

import boto3
import os
import wave
import argparse
import sys

polly = boto3.client('polly')

def createPolly (pollyText, fileName):
    response = polly.synthesize_speech(
        OutputFormat='pcm',
        Text = pollyText,
        SampleRate = '8000',
        VoiceId = 'Joanna'
    )    

    if "AudioStream" in response:
        outputWav = '../../wav_files/' + fileName + '.wav'
        with wave.open(outputWav, 'wb') as wav_file:
            wav_file.setparams((1, 2, 8000, 0, 'NONE', 'NONE'))
            wav_file.writeframes(response['AudioStream'].read())

    return outputWav

parse_msg = 'Simple utility to create wav files for SMA via Polly'
parser = argparse.ArgumentParser(prog = 'createWav.py', description = parse_msg)
parser.add_argument('-file', help='Name of file to be created (without .wav)')
parser.add_argument('-text', help='Text of the audio to be created in quotes')
args = parser.parse_args()

fileName = args.file
pollyText = args.text

if not fileName:
    print('Filename is rquired')
    sys.exit()

if not pollyText:
    print('Text is required')
    sys.exit()

wavFile = createPolly(pollyText, fileName)
print('wav file created: ' + wavFile)