Python typing_extensions介绍: NotRequired和TypedDict基本概念和使用方法

from typing_extensions import NotRequired, TypedDict

class User(TypedDict):
    name: str
    age: int
    email: str
# 使用TypedDict
user: User = {
    "name": "张三",
    "age": 30,
    "email": "zhangsan@example.com"
}

class User(TypedDict):
    name: str
    age: int
    email: NotRequired[str]
# 使用修改后的TypedDict
user1: User = {
    "name": "张三",
    "age": 30,
    "email": "zhangsan@example.com"
}
user2: User = {
    "name": "李四",
    "age": 25
    # 注意: 这里没有email字段,但仍然是有效的
}

from typing import List
class APIResponse(TypedDict):
    success: bool
    data: NotRequired[List[User]]
    error: NotRequired[str]
def process_api_response(response: APIResponse) -> None:
    if response["success"]:
        if "data" in response:
            for user in response["data"]:
                print(f"处理用户: {user['name']}")
    else:
        if "error" in response:
            print(f"错误: {response['error']}")
        else:
            print("未知错误")
# 使用示例
successful_response: APIResponse = {
    "success": True,
    "data": [
        {"name": "张三", "age": 30},
        {"name": "李四", "age": 25, "email": "lisi@example.com"}
    ]
}
error_response: APIResponse = {
    "success": False,
    "error": "未授权访问"
}
process_api_response(successful_response)
process_api_response(error_response)