如何用嵌套的字典扁平化字典列表

nested_dict_list = [
    {"name": "Alice", "age": 25, "address": {"city": "New York", "country": "USA"}},
    {"name": "Bob", "age": 30, "address": {"city": "London", "country": "UK"}},
    {"name": "Charlie", "age": 35, "address": {"city": "Paris", "country": "France"}}
]

def flatten_dict_list(nested_dict_list):
    flattened_dict = {}
    for item in nested_dict_list:
        for key, value in item.items():
            if isinstance(value, dict):
                # 递归处理嵌套字典
                nested_dict = flatten_dict(value)
                for nested_key, nested_value in nested_dict.items():
                    flattened_dict[key + "." + nested_key] = nested_value
            else:
                flattened_dict[key] = value
    return flattened_dict

flattened_dict = flatten_dict_list(nested_dict_list)
print(flattened_dict)

{
    "name": ["Alice", "Bob", "Charlie"],
    "age": [25, 30, 35],
    "address.city": ["New York", "London", "Paris"],
    "address.country": ["USA", "UK", "France"]
}