Data specifications by data classes
Project description
dataspecs
Data specifications by data classes
Installation
pip install dataspecs==1.0.1
Usage
from dataclasses import dataclass
from dataspecs import TagBase, from_dataclass
from enum import auto
from typing import Annotated as Ann
Simple specifications
class Tag(TagBase):
ATTR = auto()
DATA = auto()
@dataclass
class Weather:
temp: Ann[list[float], Tag.DATA]
humid: Ann[list[float], Tag.DATA]
location: Ann[str, Tag.ATTR]
simple_specs = from_dataclass(Weather([20.0, 25.0], [50.0, 55.0], "Tokyo"))
simple_specs
Specs([Spec(id=ID('/temp'), tags=(<Tag.DATA: 2>,), type=list[float], data=[20.0, 25.0]),
Spec(id=ID('/humid'), tags=(<Tag.DATA: 2>,), type=list[float], data=[50.0, 55.0]),
Spec(id=ID('/location'), tags=(<Tag.ATTR: 1>,), type=<class 'str'>, data='Tokyo')])
Nested specifications
class Tag(TagBase):
ATTR = auto()
DATA = auto()
DTYPE = auto()
NAME = auto()
UNITS = auto()
@dataclass
class Meta:
name: Ann[str, Tag.NAME]
units: Ann[str, Tag.UNITS]
@dataclass
class Weather:
temp: Ann[list[Ann[float, Tag.DTYPE]], Tag.DATA, Meta("Ground temperature", "K")]
humid: Ann[list[Ann[float, Tag.DTYPE]], Tag.DATA, Meta("Relative humidity", "%")]
location: Ann[str, Tag.ATTR]
nested_specs = from_dataclass(Weather([20.0, 25.0], [50.0, 55.0], "Tokyo"))
nested_specs
Specs([Spec(id=ID('/temp'), tags=(<Tag.DATA: 2>,), type=list[float], data=[20.0, 25.0]),
Spec(id=ID('/temp/0'), tags=(<Tag.DTYPE: 3>,), type=<class 'float'>, data=None),
Spec(id=ID('/temp/name'), tags=(<Tag.NAME: 4>,), type=<class 'str'>, data='Ground temperature'),
Spec(id=ID('/temp/units'), tags=(<Tag.UNITS: 5>,), type=<class 'str'>, data='K'),
Spec(id=ID('/humid'), tags=(<Tag.DATA: 2>,), type=list[float], data=[50.0, 55.0]),
Spec(id=ID('/humid/0'), tags=(<Tag.DTYPE: 3>,), type=<class 'float'>, data=None),
Spec(id=ID('/humid/name'), tags=(<Tag.NAME: 4>,), type=<class 'str'>, data='Relative humidity'),
Spec(id=ID('/humid/units'), tags=(<Tag.UNITS: 5>,), type=<class 'str'>, data='%'),
Spec(id=ID('/location'), tags=(<Tag.ATTR: 1>,), type=<class 'str'>, data='Tokyo')])
Selecting specifications
nested_specs[Tag.DATA]
Specs([Spec(id=ID('/temp'), tags=(<Tag.DATA: 2>,), type=list[float], data=[20.0, 25.0]),
Spec(id=ID('/humid'), tags=(<Tag.DATA: 2>,), type=list[float], data=[50.0, 55.0])])
nested_specs["/temp/[a-z]+"]
Specs([Spec(id=ID('/temp/name'), tags=(<Tag.NAME: 4>,), type=<class 'str'>, data='Ground temperature'),
Spec(id=ID('/temp/units'), tags=(<Tag.UNITS: 5>,), type=<class 'str'>, data='K')])
Grouping specifications
nested_specs.groups()
[Specs([Spec(id=ID('/temp'), tags=(<Tag.DATA: 2>,), type=list[float], data=[20.0, 25.0]),
Spec(id=ID('/temp/0'), tags=(<Tag.DTYPE: 3>,), type=<class 'float'>, data=None),
Spec(id=ID('/temp/name'), tags=(<Tag.NAME: 4>,), type=<class 'str'>, data='Ground temperature'),
Spec(id=ID('/temp/units'), tags=(<Tag.UNITS: 5>,), type=<class 'str'>, data='K')]),
Specs([Spec(id=ID('/humid'), tags=(<Tag.DATA: 2>,), type=list[float], data=[50.0, 55.0]),
Spec(id=ID('/humid/0'), tags=(<Tag.DTYPE: 3>,), type=<class 'float'>, data=None),
Spec(id=ID('/humid/name'), tags=(<Tag.NAME: 4>,), type=<class 'str'>, data='Relative humidity'),
Spec(id=ID('/humid/units'), tags=(<Tag.UNITS: 5>,), type=<class 'str'>, data='%')]),
Specs([Spec(id=ID('/location'), tags=(<Tag.ATTR: 1>,), type=<class 'str'>, data='Tokyo')])]
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