diff options
Diffstat (limited to 'gerbonara/apertures.py')
| -rw-r--r-- | gerbonara/apertures.py | 32 |
1 files changed, 21 insertions, 11 deletions
diff --git a/gerbonara/apertures.py b/gerbonara/apertures.py index 33b78df..0a4bf37 100644 --- a/gerbonara/apertures.py +++ b/gerbonara/apertures.py @@ -17,7 +17,7 @@ # import math -from dataclasses import dataclass, replace, field, fields, InitVar, KW_ONLY +from dataclasses import dataclass, replace, field, fields, InitVar from .aperture_macros.parse import GenericMacros from .utils import MM, Inch @@ -60,16 +60,26 @@ class Length: @dataclass class Aperture: """ Base class for all apertures. """ - _ : KW_ONLY - #: :py:class:`gerbonara.utils.LengthUnit` used for all length fields of this aperture. - unit : str = None - #: GerberX2 attributes of this aperture. Note that this will only contain aperture attributes, not file attributes. - #: File attributes are stored in the :py:attr:`~.GerberFile.attrs` of the :py:class:`.GerberFile`. - attrs : dict = field(default_factory=dict) - #: Aperture index this aperture had when it was read from the Gerber file. This field is purely informational since - #: apertures are de-duplicated and re-numbered when writing a Gerber file. For `D10`, this field would be `10`. When - #: you programmatically create a new aperture, you do not have to set this. - original_number : int = None + + # hackety hack: Work around python < 3.10 not having dataclasses.KW_ONLY. + # + # For details, refer to graphic_objects.py + def __init_subclass__(cls): + #: :py:class:`gerbonara.utils.LengthUnit` used for all length fields of this aperture. + cls.unit = None + #: GerberX2 attributes of this aperture. Note that this will only contain aperture attributes, not file attributes. + #: File attributes are stored in the :py:attr:`~.GerberFile.attrs` of the :py:class:`.GerberFile`. + cls.attrs = field(default_factory=dict) + #: Aperture index this aperture had when it was read from the Gerber file. This field is purely informational since + #: apertures are de-duplicated and re-numbered when writing a Gerber file. For `D10`, this field would be `10`. When + #: you programmatically create a new aperture, you do not have to set this. + cls.original_number = None + + d = {'unit': str, 'attrs': dict, 'original_number': int} + if hasattr(cls, '__annotations__'): + cls.__annotations__.update(d) + else: + cls.__annotations__ = d @property def hole_shape(self): |