typed_dict

Like attrs, but for dicts

What it can do:

• Generate TypedDict from pydantic models, attrs schemas, and dataclasses.
• Validate dicts using TypedDict at runtime.

Why it's cool:

• Supports multiple schema formats.
• 100% type safe.

Installation

Install:

python3 -m pip install typed-dict

And then add in plugins section of the mypy config (pyproject.toml):

[tool.mypy]
plugins = ["typed_dict"]

Usage

Generate a TypedDict from a dataclass:

from dataclasses import dataclass
import typed_dict

@dataclass
class User:
    name: str
    age: int = 99

UserDict = typed_dict.from_dataclass(User)

Now, you can use it in type annotations (and mypy will understand it):

user: UserDict = {'name': 'aragorn'}

Or with runtime type checkers, like pydantic:

import pydantic

user = pydantic.parse_obj_as(UserDict, {'name': 'Aragorn'})
assert user == {'name': 'Aragorn'}

See examples directory for more code.