def _mapdict_values(items):
    # each value in mapdict is expected to be a sequence, where each item
    # is another sequence containing a state (or several) and a value
    # E.g. (script=False):
    #   [('active', 'selected', 'grey'), ('focus', [1, 2, 3, 4])]
    #   returns:
    #   ['active selected', 'grey', 'focus', [1, 2, 3, 4]]
    opt_val = []
    for item in items:
        state = item[:-1]
        val = item[-1]
        # hacks for bakward compatibility
        state[0] # raise IndexError if empty
        if len(state) == 1:
            # if it is empty (something that evaluates to False), then
            # format it to Tcl code to denote the "normal" state
            state = state[0] or ''
        else:
            # group multiple states
            state = ' '.join(state) # raise TypeError if not str
        opt_val.append(state)
        if val is not None:
            opt_val.append(val)
    return opt_val
dataset/ETHPy150Open francelabs/datafari/windows/python/Lib/lib-tk/ttk.py/_mapdict_values/original