Port code samples of GAE Python bundled APIs from GCS

[jinglundong]

In which file did you encounter the issue?

N/A. I'm about to add a set of code samples.

Did you change the file? If so, how?

Yes. gsutil cp gs://python3-wormhole-api-samples/python3-wormhole-samples.zip .

Describe the issue

GAE Python bundled APIs went GA in April. The code samples for these APIs are still in a GCS bucket. https://storage.googleapis.com/python3-wormhole-api-samples/python3-wormhole-samples.zip

This issue is to publish these samples to python-docs-samples