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from collections import abc as collections_abc
from .. import exc
_no_tuple = ()
def _distill_params_20(params):
if params is None:
return _no_tuple
# Assume list is more likely than tuple
elif isinstance(params, list) or isinstance(params, tuple):
# collections_abc.MutableSequence): # avoid abc.__instancecheck__
if params and not isinstance(
params[0], (tuple, collections_abc.Mapping)
):
raise exc.ArgumentError(
"List argument must consist only of tuples or dictionaries"
)
return params
elif isinstance(params, dict) or isinstance(
# only do immutabledict or abc.__instancecheck__ for Mapping after
# we've checked for plain dictionaries and would otherwise raise
params,
collections_abc.Mapping,
):
return [params]
else:
raise exc.ArgumentError("mapping or list expected for parameters")
def _distill_raw_params(params):
if params is None:
return _no_tuple
elif isinstance(params, list):
# collections_abc.MutableSequence): # avoid abc.__instancecheck__
if params and not isinstance(
params[0], (tuple, collections_abc.Mapping)
):
raise exc.ArgumentError(
"List argument must consist only of tuples or dictionaries"
)
return params
elif isinstance(params, (tuple, dict)) or isinstance(
# only do abc.__instancecheck__ for Mapping after we've checked
# for plain dictionaries and would otherwise raise
params,
collections_abc.Mapping,
):
return [params]
else:
raise exc.ArgumentError("mapping or sequence expected for parameters")
|
