Method _require_entered

marimo/_code_mode/_context.py:734–743

(self)

        self._screenshot_session: _ScreenshotSession | None = None

    def _require_entered(self) -> None:
        if not self._entered:
            raise RuntimeError(
                "Cell operations require 'async with'. Use:\n"
                "\n"
                "    async with cm.get_context() as ctx:\n"
                "        ctx.create_cell(...)\n"
                "\n"
                "Without 'async with', operations are silently lost."
            )

    def _note_read(self, cell_id: CellId_t, version: int) -> None:
        self._kernel.agent.read_tracker.record_read(cell_id, version)