Python - intersection between a list and keys of a dictionary

Question

I have a list that looks like this:

l1 = [\'200:200\', \'90:728\']

I have a dictionary that looks like this:

d1 = {\'200:20         


        

Answer 1

In 3.x, this can be as simple as:

>>> {k: d1[k] for k in (d1.keys() & l1)}
{'200:200': {'foo': 'bar'}}

Under 2.7, you can use dict.viewkeys() to recreate this functionality:

>>> {k: d1[k] for k in (d1.viewkeys() & l1)}
{'200:200': {'foo': 'bar'}}

Under older versions of 2.x, it's a tad more verbose:

>>> {k: d1[k] for k in (set(d1).intersection(l1))}
{'200:200': {'foo': 'bar'}}