5. Manage Python Dependencies

In this step you will rewrite your Python application to use the Flask web framework. You must also modify your Dockerfile to install required Python dependencies from a requirements.txt file using pip.

Edit the project files

requirements.txt

Create the file requirements.txt listing Flask as a dependency

Flask==0.10.1

Dockerfile

Modify Dockerfile as shown:

main.py

Replace main.py with the code below, which uses flask.route decorator instead of webapp2.RequestHandler. The two classes HelloHandler and MessagesHandler are replaced by the functions fortune() and messages().

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-app-id>.appspot.com/). Reload the page a few times, then try http://<your-app-id>.appspot.com/messages.

Next

In the next step you'll add a native C text-to-speech synthesizer and create a sound file that reads your fortune out loud.

Go to Step 6

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