def _validate_data_checks(data_check_classes, params):
"""Inits a DataChecks instance from a list of DataCheck classes and corresponding params."""
if not isinstance(data_check_classes, list):
raise ValueError(
f"Parameter data_checks must be a list. Received {type(data_check_classes).__name__}."
)
if not all(
inspect.isclass(check) and issubclass(check, DataCheck)
for check in data_check_classes):
raise ValueError(
"All elements of parameter data_checks must be an instance of DataCheck "
"or a DataCheck class with any desired parameters specified in the "
"data_check_params dictionary.")
params = params or dict()
if not isinstance(params, dict):
raise ValueError(f"Params must be a dictionary. Received {params}")
in_params = set(params.keys())
in_classes = set([c.name for c in data_check_classes])
name_to_class = {c.name: c for c in data_check_classes}
extraneous = in_params.difference(in_classes)
missing = in_classes.difference(in_params)
for extraneous_class in extraneous:
raise DataCheckInitError(
f"Class {extraneous_class} was provided in params dictionary but it does not match any name "
"in the data_check_classes list. Make sure every key of the params dictionary matches the name"
"attribute of a corresponding DataCheck class.")
for missing_class_name in missing:
if not _has_defaults_for_all_args(
name_to_class[missing_class_name]):
raise DataCheckInitError(
f"Class {missing_class_name} was provided in the data_checks_classes list but it does not have "
"an entry in the parameters dictionary.")
def _init_data_checks(data_check_classes, params):
data_check_instances = []
for data_check_class in data_check_classes:
class_params = params.get(data_check_class.name, {})
if not isinstance(class_params, dict):
raise DataCheckInitError(
f"Parameters for {data_check_class.name} were not in a dictionary. Received {class_params}."
)
try:
data_check_instances.append(data_check_class(**class_params))
except TypeError as e:
raise DataCheckInitError(
f"Encountered the following error while initializing {data_check_class.name}: {e}"
)
return data_check_instances