pydantic-xml extension

pydantic-xml is a pydantic extension providing model fields xml binding and xml serialization / deserialization. It is closely integrated with pydantic which means it supports most of its features.

Features

• pydantic v1 / v2 support
• flexible attributes, elements and text binding
• python collection types support (Dict, TypedDict, List, Set, Tuple, ...)
• Union type support
• pydantic generic models support
• pydantic computed fields support
• lxml xml parser support
• xml.etree.ElementTree standard library xml parser support

What is not supported?

• dataclasses
• callable discriminators

Getting started

The following model fields binding:

class Product(BaseXmlModel):
    status: Literal['running', 'development'] = attr()  # extracted from the 'status' attribute
    launched: Optional[int] = attr(default=None)  # extracted from the 'launched' attribute
    title: str  # extracted from the element text


class Company(BaseXmlModel):
    trade_name: str = attr(name='trade-name')  # extracted from the 'trade-name' attribute
    website: HttpUrl = element()  # extracted from the 'website' element text
    products: List[Product] = element(tag='product', default=[])  # extracted from the 'Company' element's children

defines the XML document:

<Company trade-name="SpaceX">
    <website>https://www.spacex.com</website>
    <product status="running" launched="2013">Several launch vehicles</product>
    <product status="running" launched="2019">Starlink</product>
    <product status="development">Starship</product>
</Company>

See documentation for more details.