>>> x = {'a':1, 'b':2}

>>> x

{'a': 1, 'b': 2}

>>> y = list(x.items())

>>> y

[('a', 1), ('b', 2)

To convert back into dictionary, use the dict() function.
>>> x

{'a': 1, 'b': 2}

>>> y = list(x.items())

>>> y

[('a', 1), ('b', 2)

>>> z = dict(y)

>>> z

{'a': 1, 'b': 2}

>>> z

{'a': 1, 'b': 2}