使用GetProperty获取子属性的最佳方法

def get_nested_property(obj, property_path):
    properties = property_path.split('.')
    for prop in properties:
        if isinstance(obj, dict) and prop in obj:
            obj = obj[prop]
        else:
            return None
    return obj

# 示例用法
data = {
    "user": {
        "name": {
            "first": "John",
            "last": "Doe"
        },
        "age": 30
    }
}

first_name = get_nested_property(data, "user.name.first")
print(first_name)  # 输出 "John"