Python filtering list of objects by distinct attribute

I have a list of objects with multiple attributes. I want to filter the list based on one attribute of the object (country_code), i.e.

Current list

elems = [{'region_code': 'EUD', 'country_code': 'ROM', 'country_desc': 'Romania', 'event_number': '6880'}, 
{'region_code': 'EUD', 'country_code': 'ROM', 'country_desc':'Romania', 'event_number': '3200'}, 
{'region_code': 'EUD', 'country_code': 'ROM', 'country_desc': 'Romania', 'event_number': '4000'}, 
{'region_code': 'EUD', 'country_code': 'SVN', 'country_desc': 'Slovenia', 'event_number': '6880'}, 
{'region_code': 'EUD', 'country_code': 'NLD', 'country_desc':'Netherlands', 'event_number': '6880'}, 
{'region_code': 'EUD', 'country_code': 'BEL', 'country_desc':'Belgium', 'event_number': '6880'}]

Desired list

elems = [{'region_code': 'EUD', 'country_code': 'ROM', 'country_desc': 'Romania', 'event_number': '6880'}, 
{'region_code': 'EUD', 'country_code': 'SVN', 'country_desc': 'Slovenia', 'event_number': '6880'}, 
{'region_code': 'EUD', 'country_code': 'NLD', 'country_desc': 'Netherlands', 'event_number': '6880'}, 
{'region_code': 'EUD', 'country_code': 'BEL', 'country_desc': 'Belgium', 'event_number': '6880'}]

I can achieve this by creating a dictionary and a for-loop, but I feel like there's an easier way in python using the filter() or reduce() functions, I just can't figure out how.

Can anyone simplify the below code using in-built python functions? Performance is a big factor because the real data will be substantial.

Working code:

unique = {}
for elem in elems:
  if elem['country_code'] not in unique.keys():
     unique[elem['country_code']] = elem

print(unique.values())

Worth noting I have also tried the code below, but it performs worse than the current working code:

unique = []
for elem in elems:
    if not any(u['country_code'] == elem['country_code'] for u in unique):
        unique.append(elem)