How to get set of dictionaries from a list of duplicate dictionaries?

groupby_get_unique_dicts.py

import operator
from itertools import groupby

list_of_city_dicts = [
    {"city": "New York"},
    {"city": "Hamburg"},
    {"city": "New York"},
    {"city": "Puerto Viejo"},
]

key_func = operator.itemgetter("city")

grouped_dicts = groupby(sorted(list_of_city_dicts, key=key_func))
unique_dicts = [keys for keys, _ in grouped_dicts]


"""
>>> unique_dicts
[{'city': 'Hamburg'}, {'city': 'New York'}, {'city': 'Puerto Viejo'}]

"""