Method from_type

tables/atom.py:393–418

Create an Atom from a PyTables type. Optional shape and default value may be specified as the shape and dflt arguments, respectively:: >>> Atom.from_type('bool') BoolAtom(shape=(), dflt=False) >>> Atom.from_type('int16', shape=(2, 2))

(
        cls, type_: str, shape: Shape = (), dflt: Any = None
    )

    @classmethod
    def from_type(
        cls, type_: str, shape: Shape = (), dflt: Any = None
    ) -> Atom:
        """Create an Atom from a PyTables type.

        Optional shape and default value may be specified as the
        shape and dflt arguments, respectively::

            >>> Atom.from_type('bool')
            BoolAtom(shape=(), dflt=False)
            >>> Atom.from_type('int16', shape=(2, 2))
            Int16Atom(shape=(2, 2), dflt=0)
            >>> Atom.from_type('string40', dflt='hello')
            Traceback (most recent call last):
            ...
            ValueError: unknown type: 'string40'
            >>> Atom.from_type('Float64')
            Traceback (most recent call last):
            ...
            ValueError: unknown type: 'Float64'

        """
        if type_ not in all_types:
            raise ValueError(f"unknown type: {type_!r}")
        kind, itemsize = split_type(type_)
        return cls.from_kind(kind, itemsize, shape, dflt)

    @classmethod
    def from_kind(