text: #!/usr/bin/env python
  
  # Copyright 2018 Google Inc. All Rights Reserved.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #      http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  """Google Cloud Text-To-Speech API sample application .
  
  Example usage:
      python quickstart.py
  """
  
  
  def run_quickstart():
      # [START tts_quickstart]
      """Synthesizes speech from the input string of text or ssml.
      Make sure to be working in a virtual environment.
  
      Note: ssml must be well-formed according to:
          https://www.w3.org/TR/speech-synthesis/
      """
      from google.cloud import texttospeech
  
      # Instantiates a client
      client = texttospeech.TextToSpeechClient()
  
      # Set the text input to be synthesized
      synthesis_input = texttospeech.SynthesisInput(text="Hello, World!")
  
      # Build the voice request, select the language code ("en-US") and the ssml
      # voice gender ("neutral")
      voice = texttospeech.VoiceSelectionParams(
          language_code="en-US", ssml_gender=texttospeech.SsmlVoiceGender.NEUTRAL
      )
  
      # Select the type of audio file you want returned
      audio_config = texttospeech.AudioConfig(
          audio_encoding=texttospeech.AudioEncoding.MP3
      )
  
      # Perform the text-to-speech request on the text input with the selected
      # voice parameters and audio file type
      response = client.synthesize_speech(
          input=synthesis_input, voice=voice, audio_config=audio_config
      )
  
      # The response's audio_content is binary.
      with open("output.mp3", "wb") as out:
          # Write the response to the output file.
          out.write(response.audio_content)
          print('Audio content written to file "output.mp3"')
      # [END tts_quickstart]
  
  
  if __name__ == "__main__":
      run_quickstart()
  