有没有更好的方法来创建嵌套字典的值列表？

nested_dict = {}
keys = ['key1', 'key2', 'key3']
value = 'example'

for key in reversed(keys):
    nested_dict = {key: value}

print(nested_dict)

def create_nested_dict(keys, value):
    if len(keys) == 1:
        return {keys[0]: value}
    else:
        return {keys[0]: create_nested_dict(keys[1:], value)}

keys = ['key1', 'key2', 'key3']
value = 'example'
nested_dict = create_nested_dict(keys, value)

print(nested_dict)

from collections import defaultdict

def nested_dict():
    return defaultdict(nested_dict)

keys = ['key1', 'key2', 'key3']
value = 'example'
nested_dict = nested_dict()

for key in keys[:-1]:
    nested_dict = nested_dict[key]

nested_dict[keys[-1]] = value

print(nested_dict)