How to create small dict from another dict with array of keys?

Question

I have a simple dictionary {'a': 1, 'b': 2, 'c': 3, 'd': 4 } and list of keys: ['a', 'd'] .

What is the better way to construct dict object containing only keys from the list: {'a': 1, 'd': 4} ?

Answer 1

d = {'a': 1, 'b': 2, 'c': 3, 'd': 4 }
l = ['a', 'd']

new_d = {k:d[k] for k in l}

new_d is now {'a': 1, 'd': 4}

Answer 2

d = {'a':1, 'b':2, 'c':3, 'd':4}
c = ['a', 'b']
new_d = {}

for key in c:
    new_d[key]= d[key]