三级菜单

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')