db = {    "riskcontrol" :{        "riskinner": [            "pay-inner-api-A1",            "user-inner-api-A1"        ],        "riskweb": [            "itfin-job-A1",            "pay-web-api-A1",            "user-web-manager-A1"        ]    },    "shop": {        "shopinner": [            "home-inner-api-A1",            "product-inner-api-A1",        ],        "shopweb": [            "shop-job-A1",            "home-web-api-A1"        ]    }}path = []while True:    temp = db    for item in path:        temp = temp[item]    print('当前节点的所有子节点:',list(temp.keys()),'\n')    choice = input('1: 添加节点; 2: 查看节点(Q退出/返回上一级B) \n>>>')    if choice == '1':        k = input('请输入要添加的子节点名称: ')        if k in temp:            print('节点已经存在')        else:            temp[k] = {}    elif choice == '2':        k = input('请输入要查看的子节点: ')        if k in temp:            path.append(k)        else:            print('子节点名称错误')    elif choice.lower() == 'b':        if path:            path.pop()    elif choice.lower() == 'q':        break    else:        print('输入不合法')