typecasts

pip install typecasts

Typecasts provides a centralized repository of type conversions. Given two types - source type and destination type - it knows how to convert a value of the first into a value of the latter.

Example

from typecasts import casts
from pydantic import BaseModel

class Robot(BaseModel):
    """Robot."""

    name: str

robot = Robot(name='Chuzz')

assert casts[Robot, str](robot) == '{"name": "Chuzz"}'

Why?

Every platonic data structure converts the application-specific data types (int, bool, class Robot) into backend-specific data types (usually JSON strings or byte sequences) — and vice versa.

Writing the conversion code in each and every data structure would be boilerplate, hard to maintain and customize.