python max key dictionary key getter

1a_dictionary = {"a": 1, "b": 2, "c": 3}
2
3# get key with max value
4max_key = max(a_dictionary, key=a_dictionary.get)
5
6print(max_key)

1dic={0: 1.4984074067880424, 1: 1.0984074067880423, 2: 1.8984074067880425, 3: 2.2984074067880425, 4: 2.2984074067880425}
2max_value = max(dic.values())  # maximum value
3max_keys = [k for k, v in dic.items() if v == max_value] # getting all keys containing the `maximum`
4
5print(max_value, max_keys)

1from operator import itemgetter
2
3items = [
4    {'a': 1, 'b': 99},
5    {'a': 2, 'b': 88},
6    {'a': 3, 'b': 77},
7]
8
9print(max(items, key=itemgetter('a')))
10print(max(items, key=itemgetter('b')))