What are some popular validation tools in different programming languages?

What are some popular validation tools in different programming languages?

There are several validation tools available across different programming languages. For example, in JavaScript, you can use libraries like Joi and Validator.js. In Python, you might consider using Marshmallow or Pydantic. What specific language are you interested in?

I'm particularly interested in Python. Can you tell me more about Pydantic?

Pydantic is a data validation and settings management library for Python. It uses Python type annotations to validate data and ensure that it conforms to the expected types. It's particularly useful for parsing and validating JSON data. Would you like to see an example of how to use it?

Yes, please provide an example of using Pydantic for validation.

Sure! Here's a simple example:

from pydantic import BaseModel

class User(BaseModel):
    id: int
    name: str
    email: str

user = User(id=1, name='John Doe', email='[email protected]')
print(user)

This code defines a User model and validates the data when creating an instance. If the data doesn't match the types, it will raise a validation error.