6. Add Native C Extensions

In this step you'll modify your Dockerfile and requirements.txt to add one more dependency for the pyttsx speech-to-text synth. You'll also add one more Python module and the corresponding native library libespeak. Your app will call the new module to run the synth.

Edit the project files

requirements.txt

Add another dependency for the pyttsx speech-to-text synthesizer.

Dockerfile

Modify your Dockerfile to install the libespeak-dev binaries

synth.py

Add this file, which uses pyttsx to generate a sound file:

main.py

Use the pyttsx speech-to-text package to read out the fortune messages.

• import tempfile
• call synth.Synth()
• return an audio file speaking the fortune

Test and deploy

Run locally

$ gcloud preview app run ./app.yaml

And visit http://localhost:8080/. Reload the page a few times, then try http://localhost:8080/messages.

Deploy to the cloud

$ gcloud preview app deploy ./app.yaml

Point your browser at your appspot address (http://<your-ap-id>.appspot.com/). Reload the page a few times, then try http://<your-ap-id>.appspot.com/messages.

Next

Finally, let's take a peek at the VM underlying your app.

Go to Step 7

Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 3.0 License, and code samples are licensed under the Apache 2.0 License. For details, see our Site Policies.