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A dataclass model toolkit: serialization, validation, and more.
Available from PyPI:
pip install serious
Central part of Serious API are different Models.
Given a regular dataclass:
from dataclasses import dataclass
@dataclass
class Person:
name: str
Let’s create a JsonModel
:
from serious.json import JsonModel
model = JsonModel(Person)
And use its dump/load methods:
person = Person('Albert Einstein')
model.dump(person) # {"name": "Albert Einstein"}
To add validation to the example above all we need is to add __validate__
method to person:
from dataclasses import dataclass
from typing import Optional
from serious import ValidationError, Email
@dataclass
class Person:
name: str
email: Optional[Email]
phone: Optional[str]
def __validate__(self):
if len(self.name) == 0:
raise ValidationError('Every person needs a name')
if self.phone is None and self.email is None:
raise ValidationError('At least some contact should be present')
str
, int
, float
, bool
Dict[str, Any]
Tuple[str, int, date]
)Tuple[str, ...]
)OperatingSystem(Enum)
)Color(str, Enum)
and FilePermission(IntFlag)
)serious.types.Timestamp
: a UTC timestamp since UNIX epoch as float ms valueserious.types.Email
: a string Tiny Type that supports validation and contains additional propertiesserious.types
: FrozenList
, FrozenDict
from dataclasses import dataclass
from serious import JsonModel, ValidationError
from typing import List
from enum import Enum
class Specialty(Enum):
Worker = 1
Fool = 2
@dataclass(frozen=True)
class Minion:
name: str
type: Specialty
@dataclass(frozen=True)
class Boss:
name: str
minions: List[Minion]
def __validate__(self):
if len(self.minions) < 2:
raise ValidationError('What kind of boss are you?')
boss = Boss("me", [Minion('evil minion', Specialty.Fool), Minion('very evil minion', Specialty.Worker)])
boss_json = """{
"name": "me",
"minions": [
{
"name": "evil minion",
"type": "Fool"
},
{
"name": "very evil minion",
"type": "Worker"
}
]
}"""
model = JsonModel(Boss, indent=4)
assert model.dump(boss) == boss_json
assert model.load(boss_json) == boss
Initially, a fork of @lidatong/dataclasses-json.
FAQs
Easily serialize dataclasses to and from JSON
We found that serious demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 2 open source maintainers collaborating on the project.
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