Python (FastAPI) Examples

[so-rose]

Hey,

I was wondering if you might be interested in accepting a PR adding Python / FastAPI code examples? Or, alternatively, would you be interested in a new client library encapsulating that kind of thing?

Specifically:

• Snippet route that correctly validates pings, by implementing the pseudocode in the docs.
• Snippet route that correctly returns a payment link, using validated payment item logic.
• Pydantic schemas corresponding to (and validating) each sequence response type.
• Dependency injections for relevant validations.
• Implementation notes accessible to new devs.

For our part, more eyes on such critical code paths would be welcome, and maybe it could be a good launchpad for others who like to work in Python.