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from datetime import datetime
import attrs
import cattr
from common import Benchmark, Methods, Payment
@attrs.frozen
class Message:
title: str
body: str
addresses: list[str] | None = None
persistence: int | None = None
@attrs.frozen
class Client:
id: int = attrs.field(validator=attrs.validators.ge(0))
firstName: str # Cattrs recommand using camelCase attributes
lastName: str
@attrs.frozen
class Item:
name: str
price: float = attrs.field(validator=attrs.validators.ge(0))
quantity: int = attrs.field(default=1, validator=attrs.validators.ge(1))
@attrs.frozen
class Receipt:
store: str
address: str
date: datetime
items: list[Item]
payment: Payment
client: Client | None = None
specialOffers: float | None = attrs.field(
default=None, validator=attrs.validators.optional(attrs.validators.ge(0))
)
cattr.register_unstructure_hook(datetime, lambda v: v.isoformat())
cattr.register_structure_hook(datetime, lambda v, _: datetime.fromisoformat(v))
def methods(cls: type) -> Methods:
return Methods(
lambda data: cattr.structure(data, cls), lambda obj: cattr.unstructure(obj, cls)
)
benchmark = Benchmark(methods(Message), methods(Receipt), "cattrs")
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