Source code for astropy.units.format.base

# Licensed under a 3-clause BSD style license - see LICENSE.rst

[docs]class Base: """ The abstract base class of all unit formats. """ registry = {} def __new__(cls, *args, **kwargs): # This __new__ is to make it clear that there is no reason to # instantiate a Formatter--if you try to you'll just get back the # class return cls def __init_subclass__(cls, **kwargs): # Keep a registry of all formats. Key by the class name unless a name # is explicitly set (i.e., one *not* inherited from a superclass). if 'name' not in cls.__dict__: cls.name = cls.__name__.lower() Base.registry[cls.name] = cls super().__init_subclass__(**kwargs)
[docs] @classmethod def parse(cls, s): """ Convert a string to a unit object. """ raise NotImplementedError( f"Can not parse with {cls.__name__} format")
[docs] @classmethod def to_string(cls, u): """ Convert a unit object to a string. """ raise NotImplementedError( f"Can not output in {cls.__name__} format")