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What IS typing.Annotated?

Annotated is one of things you see around quite a bit, and while it's part of the typing library, it provides some actual runtime functionality as well! It can be used to do some pretty powerful things, so in this video, as well as learning how to use it, we'll be looking at how it's been used in the real world to do some pretty crazy things! 0:00 - Intro 0:41 - Using Annotated for attribute validation [1-4] 6:52 - Real-world case study: Msgspec [5-6] 7:58 - Real-world case study: FastAPI [7-8] 8:38 - Real-world case study: Strawberry [9] 9:30 - Outro [1] https://docs.python.org/3/library/typ... [2]    • SAVE TIME and reduce boilerplate with...   [3]    • Are descriptors the most MISUNDERSTOO...   [4] https://docs.python.org/3/library/ins... [5] https://jcristharif.com/msgspec/const... [6]    • Liked Pydantic? You'll LOVE Msgspec   [7] https://fastapi.tiangolo.com/tutorial... [8]    • Create an API in 20 MINUTES with Fast...   [9] https://strawberry.rocks/docs/types/lazy — If you want to see more of me, join my Discord server!   / discord   I get a lot of people asking, so here's my setup! • Visual Studio Code:    • My Visual Studio Code setup! (2024)   • Terminal:    • Make your terminal look AMAZING   • Desk/recording gear: https://kit.co/Carberra • PC build: https://uk.pcpartpicker.com/list/TmzGYN Affiliations (I may earn a commission): • Codecrafters -- 40% off any plan: https://app.codecrafters.io/join?via=... • Keeper Password Manager -- 30% off your first year: https://keeper.io/r/EX4FB1C — If you have any questions, don't hesitate to ask in the comments! I'll try and answer as soon as I can, providing someone else hasn't already done so. #python #coding #howto