odict.py 文件源码

def __setitem__(self, index, item):
        """Set item at position i to item."""
        if isinstance(index, types.SliceType):
            # NOTE: item must be an iterable (list of tuples)
            self._main[index] = OrderedDict(item)
        else:
            # FIXME: Does this raise a sensible error?
            orig = self._main.keys[index]
            key, value = item
            if self._main.strict and key in self and (key != orig):
                raise ValueError('slice assignment must be from '
                        'unique keys')
            # delete the current one
            del self._main[self._main._sequence[index]]
            self._main.insert(index, key, value)