Method _populate_separate_keys

lib/sqlalchemy/sql/base.py:1800–1812

populate from an iterator of (key, column)

(
        self, iter_: Iterable[Tuple[_COLKEY, _COL_co]]
    )

    __hash__: Optional[int] = None  # type: ignore

    def _populate_separate_keys(
        self, iter_: Iterable[Tuple[_COLKEY, _COL_co]]
    ) -> None:
        """populate from an iterator of (key, column)"""

        self._collection[:] = collection = [
            (k, c, _ColumnMetrics(self, c)) for k, c in iter_
        ]
        self._colset.update(c._deannotate() for _, c, _ in collection)
        self._index.update(
            {idx: (k, c) for idx, (k, c, _) in enumerate(collection)}
        )
        self._index.update({k: (k, col) for k, col, _ in reversed(collection)})

    def add(
        self, column: ColumnElement[Any], key: Optional[_COLKEY] = None