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Nuno André
bd0a28d8d7
* Avoid __dict__ and __weakref__ attributes in AnyUrl and _BaseAddress subclasses When inheriting from a class with `__slots__`, [child subclasses will get a `__dict__` and `__weakref__` unless they also define `__slots__`](https://docs.python.org/3/reference/datamodel.html#notes-on-using-slots). ```python from pydantic import AnyUrl, AnyHttpUrl class AnyOtherHttpUrl(AnyUrl): allowed_schemes = {'http', 'https'} __slots__ = () print(set(dir(AnyHttpUrl)) - set(dir(AnyUrl))) #> {'__weakref__', '__dict__'} print(set(dir(AnyOtherHttpUrl)) - set(dir(AnyUrl))) #> set() ``` * Update changes/2890-nuno-andre.md Co-authored-by: Samuel Colvin <samcolvin@gmail.com> Co-authored-by: Samuel Colvin <s@muelcolvin.com>
pydantic
Data validation and settings management using Python type hints.
Fast and extensible, pydantic plays nicely with your linters/IDE/brain. Define how data should be in pure, canonical Python 3.7+; validate it with pydantic.
Help
See documentation for more details.
Installation
Install using pip install -U pydantic or conda install pydantic -c conda-forge.
For more installation options to make pydantic even faster,
see the Install section in the documentation.
A Simple Example
from datetime import datetime
from typing import List, Optional
from pydantic import BaseModel
class User(BaseModel):
id: int
name = 'John Doe'
signup_ts: Optional[datetime] = None
friends: List[int] = []
external_data = {'id': '123', 'signup_ts': '2017-06-01 12:22', 'friends': [1, '2', b'3']}
user = User(**external_data)
print(user)
#> User id=123 name='John Doe' signup_ts=datetime.datetime(2017, 6, 1, 12, 22) friends=[1, 2, 3]
print(user.id)
#> 123
Contributing
For guidance on setting up a development environment and how to make a contribution to pydantic, see Contributing to Pydantic.
Reporting a Security Vulnerability
See our security policy.