Python -如何填充遵循嵌套层次结构的列表字典？

def fill_nested_dict(data, keys, value):
    if len(keys) == 1:
        data[keys[0]] = value
    else:
        key = keys[0]
        if key not in data:
            data[key] = {}
        fill_nested_dict(data[key], keys[1:], value)

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

fill_nested_dict(nested_dict, keys, value)
print(nested_dict)