How to get row_key from row index?

[JOJ0]

Since I'm constantly struggling with DataTable basics, I'll ask upfront without endlessly searching (again) in existing docs and discussions:

How can I retrieve the row_key if I only know the index of the row (not sure if that term is correct, let's call it "when I know for example I want the row_key of the very first row (index 0?) in my currently displaying data table)

In the end I often would like to access the contents/value of the currently highlighted cell.

For example I want a key-press-event to execute an action, what is the basic code to get the cell contents of for example cell at column 3 and row 5:

    def action_toggle_sold(self):
        """When shortcut is pressed, toggle field "sold" in DB."""
        rlog = self.query_one(RichLog)
        col_key = "sold"  # This column label exists, and I successfully used it elsewhere in my program, so no problems there...
        row_key = ?  # I don't understand how to get this?
        rlog.write("row_key is", row_key)

PS: I (think) I understand by now, that self.table.get_cell() wants row_key and column_key as arguments and does not understand simple indexes (or whatever they are called) like (3, 5)

[JOJ0]

I'm very sorry but I was too dumb to search correctly. Is this my answer? #3623

[TomJGooding]

It sound like you actually want DataTable.get_cell_at?

[JOJ0]

Thanks a lot! Yes that works:

        row_num = self.table.cursor_row
        rlog.write(self.table.get_cell_at(Coordinate(row_num, 1)))

I just realized that my problem was that I was mixing row_keys and row ids/coordinates and that can't work. In the end I'm using the solution in the other link since I want to use the more readable column_key (eg. "sold" as in my example above).

Thanks again!

[recsater-uf]

Here is the actual answer to the title, not one modified based on author's original intention.

def row_index_to_key(table, index): -> RowKey | None
    coordinate = Coordinate(index, 0)
     if table.is_valid_coordinate(coordinate):
        return table.coordinate_to_cell_key(coordinate).row_key
    return None