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# engine/_py_util.py # Copyright (C) 2005-2024 the SQLAlchemy authors and contributors # <see AUTHORS file> # # This module is part of SQLAlchemy and is released under # the MIT License: https://www.opensource.org/licenses/mit-license.php from __future__ import annotations import typing from typing import Any from typing import Mapping from typing import Optional from typing import Tuple from .. import exc if typing.TYPE_CHECKING: from .interfaces import _CoreAnyExecuteParams from .interfaces import _CoreMultiExecuteParams from .interfaces import _DBAPIAnyExecuteParams from .interfaces import _DBAPIMultiExecuteParams _no_tuple: Tuple[Any, ...] = () def _distill_params_20( params: Optional[_CoreAnyExecuteParams], ) -> _CoreMultiExecuteParams: 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, 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, Mapping, ): return [params] else: raise exc.ArgumentError("mapping or list expected for parameters") def _distill_raw_params( params: Optional[_DBAPIAnyExecuteParams], ) -> _DBAPIMultiExecuteParams: 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, 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, Mapping, ): # cast("Union[List[Mapping[str, Any]], Tuple[Any, ...]]", [params]) return [params] # type: ignore else: raise exc.ArgumentError("mapping or sequence expected for parameters")
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