def find_title_and_path(data, key, path=None, level=0):
    if path is None:
        path = []
    
    if 'key' in data and data['key'] == key:
        # 当前层级的title加入路径
        path.append((data['title']))
        return data['title'], level, path
    elif 'children' in data:
        for child in data['children']:
            title, child_level, updated_path = find_title_and_path(child, key, path + [(data['title'])], level + 1)
            if title is not None:
                return title, child_level, updated_path
    return None, -1, path

# 示例数据
data = {
    "title": "数据标准",
    "key": "100",
    "value": "100",
    "dscatalog_parent_id": "0",
    "children": [
        {
            "title": "基础标准",
            "key": "101",
            "value": "101",
            "dscatalog_parent_id": "100",
            "children": [
                {"title": "客户", "key": "104", "value": "104", "dscatalog_parent_id": "101"},
                {"title": "客户基础信息", "key": "105", "value": "105", "dscatalog_parent_id": "101"},
                {"title": "账户", "key": "106", "value": "106", "dscatalog_parent_id": "101"},
                {"title": "账户基础信息", "key": "107", "value": "107", "dscatalog_parent_id": "101"}
            ]
        },
        {
            "title": "指标标准",
            "key": "102",
            "value": "102",
            "dscatalog_parent_id": "100",
            "children": [
                {"title": "风险", "key": "103", "value": "103", "dscatalog_parent_id": "102"}
            ]
        }
    ]
}

# 测试函数
key_to_find = "106"
title, level, path = find_title_and_path(data, key_to_find)

if {level} == 2 :
    std_pri_clas = path[0]
    std_scd_clas = path[1]
    std_thre_clas = path[2]
if {level} == 1 :
    std_pri_clas = path[0]
    std_scd_clas = path[1]
    std_thre_clas = None
if {level} == 0 :
    std_pri_clas = path[0]
    std_scd_clas = None
    std_thre_clas = None
else:
    pass

# if title:
#     print(f"The title with key '{key_to_find}' is '{title}' and it is at level {level}.")
#     print("Path:")
#     for title in path:
#         print(f"{title}")
# else:
    print(f"No title found for key '{key_to_find}'.")