didactic-pydantic

Bidirectional adapter between pydantic.BaseModel and dx.Model.

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Contributes didactic.pydantic to the namespace package.

Install

pip install didactic-pydantic

The package depends on didactic and pydantic>=2.10.

Quickstart

from_pydantic converts a pydantic.BaseModel subclass into a dx.Model subclass:

from pydantic import BaseModel, Field
from didactic.pydantic import from_pydantic


class PydUser(BaseModel):
    id: str
    email: str = Field(description="primary contact")


User = from_pydantic(PydUser)

Field annotations, defaults, factories, aliases, descriptions, examples, and the deprecated flag carry across. Annotated[T, ...] constraint metadata flows through unchanged, so annotated-types primitives (Ge, Le, ...) continue to produce axioms on the didactic side.

Custom Pydantic validators (@field_validator, @model_validator), @computed_field, and discriminated unions are not translated; the Pydantic interop guide lists the didactic-side replacements.

to_pydantic is the inverse direction:

import didactic.api as dx
from didactic.pydantic import to_pydantic


class User(dx.Model):
    id: str
    email: str = dx.field(description="primary contact")


PydUser = to_pydantic(User)

Use to_pydantic to expose a dx.Model to FastAPI, OpenAPI generators, or any other Pydantic-shaped tool. The conversion is cached, so repeated calls with the same input return the same Pydantic class.

Documentation

See Guides > Pydantic interop for the full feature matrix and round-trip behaviour.

License

Released under the MIT License.

Key dates

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Credits

Author: Aaron Steven White

License expression

MIT
View SPDX License List

Requires

Python >=3.14

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