'Configure all table cells in the given column.  Valid keyword
arguments are: ``background``, ``bg``, ``foreground``, ``fg``,
``selectbackground``, ``selectforeground``.'

def columnconfigure(self, col_index, cnf={}, **kw):

    lb = self._listboxes[col_index]
    cnf = dict((list(cnf.items()) + list(kw.items())))
    for (key, val) in list(cnf.items()):
        if (key in ('background', 'bg', 'foreground', 'fg', 'selectbackground', 'selectforeground')):
            for i in range(lb.size()):
                lb.itemconfigure(i, {key: val})
        else:
            lb.configure({key: val})
