dynamic search list

>>> d = {'a': 1, 'c': 3, 'b': 2}
{'a': 1, 'c': 3, 'b': 2}
>>> [(k,v) for k, v in d.items() if k == 'a' or k == 'b']
[('a', 1), ('b', 2)]
>>> j = [(k,v) for k, v in d.items() if k == 'a' or k == 'b']
>>> j
[('a', 1), ('b', 2)]
>>> dict(j)
{'a': 1, 'b': 2}
>>>