Class _ColumnCollection

src/pptx/table.py:451–472

Sequence of table columns.

class _ColumnCollection(Subshape):
    """Sequence of table columns."""

    def __init__(self, tbl: CT_Table, parent: Table):
        super(_ColumnCollection, self).__init__(parent)
        self._parent = parent
        self._tbl = tbl

    def __getitem__(self, idx: int):
        """Provides indexed access, (e.g. 'columns[0]')."""
        if idx < 0 or idx >= len(self._tbl.tblGrid.gridCol_lst):
            msg = "column index [%d] out of range" % idx
            raise IndexError(msg)
        return _Column(self._tbl.tblGrid.gridCol_lst[idx], self)

    def __len__(self):
        """Supports len() function (e.g. 'len(columns) == 1')."""
        return len(self._tbl.tblGrid.gridCol_lst)

    def notify_width_changed(self):
        """Called by a column when its width changes. Pass along to parent."""
        self._parent.notify_width_changed()


class _RowCollection(Subshape):