Does Pydantic Replace Dataclasses in Python?

Today we learn about Pydantic and discuss whether it replaces Python's dataclasses or not.

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Timestamps:
(0:00) Intro
(0:20) Pydantic Fundamentals
(3:16) Validating Fields
(9:43) Root Validators
(12:55) Parsing JSON Data
(16:38) Outro

[dariuszspiewak]

The nested if's can easily be turned into a sequence of guard clauses, which should ease the burden on the eyes and boost the understanding of what the code is supposed to do. Just a hint... :)

[felicytatomaszewska]

At 8:32 you don't need to define a validator for age and score, instead using PositiveFloat from pydantic as type for these fields does the same.

[wlkmn]

No, it doesn't! They are completely different things. Pydantic is a validation and serialization library, dataclasses is essentially a code generation tool for classes, which help you avoid boilerplate when defining classes. They have totally different features, and are completely different things!

If you would use pydantic instead of dataclasses, your code would be way slower. You can't use dataclasses instead of pydantic, because it doesn't provide serialization and you can't really validate user input with it.

[gnani-resj]

i have a doubt, how to destructor the JSON file, if we have nested objects inside an array ?

[meisj]

Hey can we put constructor inside? Tried it but when I do the validators are not invoked.

[pucek]

Hello, can someone explain to me, why there is a @classmethod before defining a validator? I think it's optional, because the documentation on pydantic does not mention that. I'm just curious why it is there

[irmdev]

for root_validators

the "values" is a pydantic keyword? how does it know that "email" is one of the fields?

more dataclasses with functions inside the dataclass!

[DanielRodriguez-elgb]

What could we do if someone makes an assigment to an attribute after the instance? As far as i understand, custom validations are not executed when that happens.

[jaypatel]

can we have more advance video on this ? bdw Kudos for this !!😉

[zakariaabderrahmanesadelao]

Amazing and clear explanation as usual! However, one criticism I have is regarding the speed of delivery of information. Nonetheless, we appreciate your abundant knowledge

[stevenwilson]

Not sure what I am doing wrong but the code does not work for me. Using Python 3.10.7 64-bit

[nithinjp]

So are you the guy that writes the chatgpt produced codes, because you are amazing. Dammn

[kosmonautofficial]

thanks this helped me out I really need to start using this!

[eugenung]

Great explanations! Thanks! Your videos are very useful

[szymonzywko]

I cried when i saw this nasted if's in 7:30