werkzeug.MultiDict.update¶

MultiDict.update(other_dict)[source]¶

update() extends rather than replaces existing key lists:

>>> a = MultiDict({'x': 1})
>>> b = MultiDict({'x': 2, 'y': 3})
>>> a.update(b)
>>> a
MultiDict([('y', 3), ('x', 1), ('x', 2)])

If the value list for a key in other_dict is empty, no new values will be added to the dict and the key will not be created:

>>> x = {'empty_list': []}
>>> y = MultiDict()
>>> y.update(x)
>>> y
MultiDict([])