def get_metadata_for_file(filename: PathLike) -> Dict[str, Any]:
"""
Returns the EXIF metadata for ``filename``, as a ``key: value`` mapping.
:param filename:
"""
filename = PathPlus(filename)
if not filename.is_file():
raise FileNotFoundError(filename)
# get the tags
with filename.open("rb") as fp:
data = exifread.process_file(fp, details=False, debug=False)
if data:
return {k: str(v) for k, v in data.items()}
else:
# using exiftool as a backup for some files including videos
with exiftool.ExifTool() as et:
try:
data = et.get_metadata(str(filename))
except json.decoder.JSONDecodeError:
raise ValueError(
f"Could not parse EXIF data for {filename} or no EXIF data found."
)
return dict(data)
def run(self, filename: PathLike):
"""
Parse configuration from the given file.
:param filename: The filename of the YAML configuration file.
"""
filename = PathPlus(filename)
if not filename.is_file():
raise FileNotFoundError(str(filename))
with tempfile.TemporaryDirectory() as tmpdir:
tmpdir_p = PathPlus(tmpdir)
schema_file = tmpdir_p / "schema.json"
schema = make_schema(*self.config_vars)
schema["additionalProperties"] = self.allow_unknown_keys
schema_file.dump_json(schema)
validate_files(schema_file, filename)
parsed_config_vars: MutableMapping[str, Any] = {}
with filename.open() as file:
raw_config_vars: Mapping[str, Any] = YAML(typ="safe",
pure=True).load(file)
for var in self.config_vars:
parsed_config_vars[var.__name__] = getattr(
self, f"visit_{var.__name__}", var.get)(raw_config_vars)
return self.custom_parsing(raw_config_vars, parsed_config_vars,
filename)
def get_validated_tree(xml_file: PathLike, schema_file: Optional[PathLike] = None) -> _ElementTree:
"""
Returns a validated lxml objectify from the given XML file, validated against the schema file.
:param xml_file: The XML file to validate.
:param schema_file: The schema file to validate against.
:returns: An lxml ElementTree object. When .getroot() us called on the tree the root will be an instance of
:class:`lxml.objectify.ObjectifiedElement`.
"""
if not isinstance(xml_file, pathlib.Path):
xml_file = pathlib.Path(xml_file)
if not xml_file.is_file():
raise FileNotFoundError(f"XML file '{xml_file}' not found.")
schema: Optional[etree.XMLSchema] = None
if schema_file is not None:
if not isinstance(schema_file, pathlib.Path):
schema_file = pathlib.Path(schema_file)
if not schema_file.is_file():
raise FileNotFoundError(f"XML schema '{schema_file}' not found.")
schema = etree.XMLSchema(etree.parse(str(schema_file)))
parser = objectify.makeparser(schema=schema)
tree: _ElementTree = objectify.parse(str(xml_file), parser=parser)
if schema:
assert schema.validate(tree)
return tree
