Question

I have a dictionary:

D = { "foo" : "bar", "baz" : "bip" }

and I want to create new dictionary that has a copy of one of it’s elements k. So if k = "baz":

R = { "baz" : "bip" }

what I’ve got now is:

R = { k : D[k] }

But in my case k is a complex expression and I’ve got a whole stack of these. Caching k in a temporary looks about as ugly as the original option.

What I’m looking for is a better (cleaner) way to do this.

Answer 1

def take(dictionary, key):
    return {key: dictionary[key]}

R = take(D, k)