Pythonically transforming a dictionary
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I have 2 dicts:

    dict1 = {'field1':'value1', 'field2':'value2'}
    dict2 = {'field1':'value1_1', 'field2':'value2_2','field3':'value3_3'}

I want dict1's field1 and field2's values to be dict2's field1 and field2's values.

So i want dict1 to be: `dict1 = {'field1':'value1_1', 'field2':'value2_2'}`

What is the most pythonic way of doing it?

