Intersecting two dictionaries in Python

Question

I am working on a search program over an inverted index. The index itself is a dictionary whose keys are terms and whose values are themselves dictionaries of short document

Answer 1

In [1]: d1 = {'a':1, 'b':4, 'f':3}

In [2]: d2 = {'a':1, 'b':4, 'd':2}

In [3]: d = {x:d1[x] for x in d1 if x in d2}

In [4]: d
Out[4]: {'a': 1, 'b': 4}