obj = grid.new(...)

# sub-grid slices
sub_grid_1: grid.Grid = obj[start:,:stop] 
sub_grid_2: grid.Grid = obj[[1,2,5], start:]
sub_grid_3: grid.Grid = obj[start:, [1,2,5]]
sub_grid_4: grid.Grid = obj[[4], [1,2,5]]

# row/col slices
list_view_x:  grid.Grid = obj[0, start:stop]
list_view_y: grid.Grid  = obj[start:stop, 5]

# scalar
scalar:  grid.Grid  = obj[9, 5]