Dictionary keys match on list; get key/value pair

Question

In python... I have a list of elements 'my_list', and a dictionary 'my_dict' where some keys match in 'my_list'.

I would like to search the dictionary and retrieve key/value pairs for the keys matching the 'my_list' elements.

I tried this...

    if any(x in my_dict for x in my_list):
          print set(my_list)&set(my_dict)

But it doesn't do the job.

Answer 1

Don't use dict and list as variable names. They shadow the built-in functions. Assuming list l and dictionary d:

kv = [(k, d[k]) for k in l if k in d]

Answer 2

(I renamed list to my_list and dict to my_dict to avoid the conflict with the type names.)

For better performance, you should iterate over the list and check for membership in the dictionary:

for k in my_list:
    if k in my_dict:
        print(k, my_dict[k])

If you want to create a new dictionary from these key-value pairs, use

new_dict = {k: my_dict[k] for k in my_list if k in my_dict}