grid.py

import urwid

def setup_cells():
    layout = [0, None, None, 1, 2, 3, None, 4, None, 5, 6, 7, 8, 9, 10, 11, 12,
            13, 14, None, 15, 16, None, 17, None]
    cells = []
    for item in layout:
        if item is None:
            pile = urwid.Pile([])
        else:
            pile = urwid.Pile([urwid.Text("Cell %d" % item), urwid.Edit()])
        cells.append(pile)
    return cells

def setup_grid(loop):
    width = int((loop.screen.get_cols_rows()[0] - 2) / 3)
    return urwid.GridFlow(setup_cells(), width, 1, 1, "left")

def main():
    loop = urwid.MainLoop(None)
    widget = urwid.Filler(setup_grid(loop))
    loop.widget = widget
    loop.run()

main()