# PlacedRow

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    <tr>
        <td style="text-align: left; border-style: hidden">*class*  of [dascore.core._spool_inventory](`dascore.core._spool_inventory`)<br>inherits from: tuple 
</td>
        <td style="text-align: right; border-style: hidden">[source](https://github.com/DASDAE/dascore/blob/dev/dascore/core/_spool_inventory.py#L1109-L1122)</td>
    </tr>
</table>

:::{.padded_bottom_10pt}

:::{.def_block}


<b>PlacedRow</b>(<br>
    &nbsp;&nbsp;&nbsp;&nbsp;context: Any
,<br>
    &nbsp;&nbsp;&nbsp;&nbsp;low: Any
,<br>
    &nbsp;&nbsp;&nbsp;&nbsp;high: Any
,<br>
    &nbsp;&nbsp;&nbsp;&nbsp;grid: numpy.ndarray | None[ndarray, None]
,<br>
    &nbsp;&nbsp;&nbsp;&nbsp;distances: numpy.ndarray | None[ndarray, None]
,<br>
    &nbsp;&nbsp;&nbsp;&nbsp;reason: str | None[str, None]
,<br>
)


:::

:::
One index row's channels, placed on its optical path.