def _get_zip_keys(spec):
"""
Extracts zip_keys from `spec` and standardizes value into a list of zip_groups
(tuples of keys (string)).
:param spec:
:type spec: `dict`
:return: Standardized zip_keys value
:rtype: `list` of `tuple` of `str`
:raise ValueError: zip_keys cannot be standardized
"""
zip_keys = spec.get('zip_keys')
if not zip_keys:
return []
elif islist(zip_keys, uniform=lambda e: isinstance(e, string_types)):
return [tuple(zip_keys)]
elif islist(zip_keys, uniform=lambda e: islist(e, uniform=lambda e: isinstance(e, string_types))):
return [tuple(zg) for zg in zip_keys]
raise ValueError("zip_keys expect list of string or list of lists of string")
def _get_zip_keys(spec):
"""
Extracts 'zip_keys' from `spec` and standardizes value into a list of zip_groups
(tuples of keys (string)).
:param spec: Variants specification
:type spec: dict
:return: Standardized 'zip_keys' value
:rtype: set
:raise ValueError: 'zip_keys' cannot be standardized
"""
zip_keys = spec.get('zip_keys')
if not zip_keys:
return set()
elif islist(zip_keys, uniform=lambda e: isinstance(e, string_types)):
return {frozenset(zip_keys)}
elif islist(zip_keys,
uniform=lambda e: islist(
e, uniform=lambda e: isinstance(e, string_types))):
return {frozenset(zg) for zg in zip_keys}
raise ValueError(
"'zip_keys' expect list of string or list of lists of string")