Pydantic - Nested Models, JSON Schema and Auto-Generating Models with datamodel-code-generator

In this video, we dive further into the Pydantic library in Python. This is based on the following blog post:
bugbytes.io/posts/pydantic-ne...
We'll learn a number of things, including:
* How to define nested Pydantic models, forming parent-child relationships that allow us to model complex data that contains relationships.
* Using typing.Literal to constrain values on a field
* Defining default values for fields
* Generating JSON Schema from Pydantic models
* Auto-generating Pydantic models from JSON Schema definitions
Github data: github.com/bugbytes-io/datasets
📌 𝗖𝗵𝗮𝗽𝘁𝗲𝗿𝘀:
00:00 Intro
03:47 Adding new Pydantic model for nested data
05:19 Adding a link to nested model in parent Pydantic class
07:38 The effect of the Union type on a Pydantic field
10:29 Constraining field values with Python Literal type
12:53 Adding custom validator function to check list length
15:05 JSON Schema outputs with Pydantic models
18:46 Auto-generating Pydantic models from JSON Schema with datamodel-code-generator
☕️ 𝗕𝘂𝘆 𝗺𝗲 𝗮 𝗰𝗼𝗳𝗳𝗲𝗲:
To support the channel and encourage new videos, please consider buying me a coffee here:
ko-fi.com/bugbytes
▶️ Full Playlist:
• Pydantic
𝗦𝗼𝗰𝗶𝗮𝗹 𝗠𝗲𝗱𝗶𝗮:
📖 Blog: bugbytes.io/posts/pydantic-ne...
👾 Github: github.com/bugbytes-io/datasets
🐦 Twitter: / bugbytesio
📚 𝗙𝘂𝗿𝘁𝗵𝗲𝗿 𝗿𝗲𝗮𝗱𝗶𝗻𝗴 𝗮𝗻𝗱 𝗶𝗻𝗳𝗼𝗿𝗺𝗮𝘁𝗶𝗼𝗻:
Pydantic Blog post: www.bugbytes.io/posts/pydanti...
Github Dataset: github.com/bugbytes-io/datasets
Pydantic Models: docs.pydantic.dev/usage/models/
Pydantic Validators: docs.pydantic.dev/usage/valid...
Pydantic Schema: docs.pydantic.dev/usage/schema/
JSON Schema: json-schema.org/
#python #pydantic #datascience

[@silkogelman]

Thanks for another great Pydantic tutorial Lyle! 🙏😀
Great tip about possible undesired conversion behaviour at 8:38 and the order of union types.
I'm looking forward to the next one.

[@bugbytes3923]

Thank you Sil! Glad that tip was useful.

[@zeinabmeftah]

Great Lesson
Thanx
the typing.Literal tip was very helpful for me .

[@bugbytes3923]

No problem, and thank you for watching!

[@seydinaoumarsamabaly1806]

Thank you for the effort and just thank you mate 🙌🏾 great tutorial again as usual !

[@bugbytes3923]

Thank you mate!

[@JustinSpryce]

Great lesson

[@bugbytes3923]

Thank you Justin!

[@mrrobinhood5]

How do you not have more views?! This is great content

[@bugbytes3923]

Thanks a lot, glad to hear that! Thanks for watching.

[@MdHasan-kh4dq]

This is the best explanation. Your tutorial is very helpful for me to understand the topic clearly. I would love to watch a series of FastAPI with Pydantic from you.

[@bugbytes3923]

Thanks a lot! I have started creating such a playlist on FastAPI and Pydantic here:
ua-cam.com/play/PL-2EBeDYMIbQghmnb865lpdmYyWU3I5F1.html

[@mohammedbahnasy9870]

Thank you very much ❤❤

[@bugbytes3923]

Thanks a lot for watching!

[@vivaldi-qo7xj]

thnx

[@bugbytes3923]

You're welcome, thank you for watching.

[@ShawnMorel]

FYI `schema_json` is deprecated in pydantic v2 and replaced with `model_json_schema`

[@bugbytes3923]

Thanks for sharing! Need to update these now that v2 is out.

[@DreamsAPI]

Hi Cool video, can you share the link to the video for the third video in this series? Thank you for making them.

[@DreamsAPI]

ua-cam.com/video/Z0a0Vjd992I/v-deo.html&ab_channel=BugBytes

[@bugbytes3923]

Thanks very much! The link for the next video is:
ua-cam.com/video/Z0a0Vjd992I/v-deo.html

[@DreamsAPI]

@@bugbytes3923 Gracias

[@dmitrymikhailovnicepianomu8688]

Unbelievable

[@bugbytes3923]

Cheers!

[@malteplath]

5:40 - please don't assign a list (or any mutable type) as a default value. Even if Pydantic probably handles this gracefully, it is a trap for users of the class if they construct Student objects and use append to build the list of modules. Use the field helper class instead.

[@bugbytes3923]

Non-hashable values can safely be used in Pydantic as defaults:
docs.pydantic.dev/latest/concepts/models/#fields-with-non-hashable-default-values