keepa.models.backend.Format# pydantic model keepa.models.backend.Format# Backend Format model generated from the Keepa Java schema. Fields: asin (str | None) format (str | None) field asin: str | None = None# The ASIN of the format. field format: str | None = None# The type of format, which can be one of the following: Kindle, Paperback, Hardcover, Audiobook, or Spiral-bound.