menu={'jx':{'shangrao':{'yiyang':{'zuoshenwei':{'staff':69,'money':9002869}, 'haungjia':{'landscape':'beatiful','dog':4} }, 'hengfeng':{}, 'yangshang':{}, }, 'yingtang':{'yugan':{}, 'yiangtanshi':{} }, 'ganzhou':{'ei':{}, 'ei':{} }, }, 'gx':{'nanning':{}, 'liuzhou':{}, 'guiling':{}, }, 'hn':{'yueyan':{}, 'hangyang':{}, 'huaihua':{}, }, 'gd':{'guangzhou':{}, 'jiangmen':{}, 'shengzheng':{}, 'fosheng':{} }}current_layer=menuparent_layer=[]while True: for key,value in enumerate(current_layer,1): print(key,value) choice=input('>>>').strip() if len(choice)==0: continue if choice in current_layer[choice]: parent_layer.append(current_layer) current_layer=current_layer[choice] elif:choice=='b': if parent_layer: current_layer=parent_layer.pop()else: print('invalid character for your input') usage: current:at present layer to loop.to implement advanced fuction The programe work more concise and clear ,precise
来源：https://www.cnblogs.com/alansuny/p/12443909.html