def __getitem__(self, key):
        try:
            list_ = dict.__getitem__(self, key)
        except KeyError:
            raise MultiValueDictKeyError("Key %r not found in %r" % (key, self))
        try:
            return list_[-1]
        except IndexError:
            return []
Returns the last data value for this key, or [] if it's an empty list;
dataset/ETHPy150Open kdart/pycopia/aid/pycopia/dictlib.py/MultiValueDict.__getitem__