Use dotty-dict

[ric-evans]

replace this:

file_catalog/file_catalog/utils.py

Lines 8 to 30 in 8b4c881

	class DottedKeyError(KeyError):
	"""Raised when a value cannot be retrieved using a dot-syntax key."""
	def get_val_in_dict_dotted(field: str, dicto: Dict[str, Any]) -> Any:
	"""Return value of the `field` at the key/sub-key (dot syntax) from `dicto`.
	Raises:
	DottedKeyError - if field not found / parent-field is not `dict`-like
	"""
	try:
	if "." not in field: # simple field; ex: "logical_name", "sha512"
	return dicto[field] # possible KeyError/TypeError
	# compound field; ex: "checksum.sha512"
	parent, child = field.split(".", maxsplit=1) # ex: "checksum" & "sha512"
	# ex: is "sha512" in "checksum"'s dict?
	# possible KeyError/TypeError
	return get_val_in_dict_dotted(child, dicto[parent])
	except (KeyError, TypeError) as e:
	raise DottedKeyError() from e

with this: https://pypi.org/project/dotty-dict/

[ric-evans]

WIPACrepo/wipac-dev-tools#31