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"""The Reader classes return high-level content structures from files.
The Reader fulfills two purposes:
First, it brokers between multiple libraries and file formats.
Second, it separates multiple aspects of a file into distinct content types.
Part of the bsie module.
A copy of the license is provided with the project.
Author: Matthias Baumgartner, 2022
"""
# imports
import abc
import typing
# bsie imports
from bsie.utils import bsfs
# exports
__all__: typing.Sequence[str] = (
'Reader',
)
## code ##
class Reader(abc.ABC):
"""Read and return some content from a file."""
def __str__(self) -> str:
return bsfs.typename(self)
def __repr__(self) -> str:
return f'{bsfs.typename(self)}()'
def __eq__(self, other: typing.Any) -> bool:
return isinstance(other, type(self))
def __hash__(self) -> int:
return hash(type(self))
@abc.abstractmethod
def __call__(self, path: bsfs.URI) -> typing.Any:
"""Return some content of the file at *path*.
Raises a `ReaderError` if the reader cannot make sense of the file format.
"""
## EOF ##
|
