python之路-基础篇3
data = { "水果":{"香蕉":{
"产地":["海南","马尔代夫"],
"价格":
},
"苹果":{
"产地":["美国","山东"],
"价格":
},
"荔枝":{
"产地":["台湾","云南","广西"],
"价格":
},
},
"蔬菜":{
"菜花":{
"产地":["河北","河南"],
"价格":
},
"西红柿":{
"产地":["怀柔","延庆"],
"价格":
},
},
"调料":{
"酱油":{
"品牌":["海天","鲁花","李锦记"],
"价格":
},
"食用盐":{
"品牌":["久大","白象"],
"价格":
},
},
}
while True:
for i in data:
print(i)
choice = input("选择进入1>>:")
if choice in data:
while True:
for i2 in data:
print("\t",i2)
choice2 = input("输入b返回上一级菜单或选择进入2>>:")
if choice2 in data:
while True:
for i3 in data:
print("\t\t",i3)
choice3 = input("输入b返回上一级菜单或选择进入3>>:")
if choice3 in data:
for i4 in data:
print("\t\t",i4)
choice4 = input("输入b返回上一层，或输入q退出>>:")
if choice4 == "b":
pass
elif choice4 == "q":
exit()
if choice3 == "b":
break
elif choice3 == "q":
exit()
if choice2 == "b":
break
elif choice2 == "q":
exit()
else:
print("输入内容不存在。")
break
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