data = {

"北京":{

"昌平":{

"沙河":["oldboy","test"],

"天通苑":["鏈家地產","我愛我家"]

},

"朝陽":{

"望京":["奔馳","陌陌"],

"國貿":["CICC","HP"],

"東直門":["Advent","飛信"]

},

"海淀":{}

},

"山東":{

"德州":{"a":[1,2]},

"青島":{"b":[3,4]},

"濟南":{"c":[5,6]}

},

"廣東":{

"東莞":{"d":[7,8]},

"常熟":{"e":[9,2]},

"佛山":{"f":[10,2]}

}

}

exit_flag = False

while not exit_flag:

for i in data: #第一層

print(i)

choice = input("選擇進入>>>1：")

if choice in data:

while not exit_flag:

for i2 in data[choice]: #第二層

print("\t",i2)

choice2 = input("選擇進入>>>2:")

if choice2 in data[choice]:

while not exit_flag:

for i3 in data[choice][choice2]: #第三層

print("\t",i3)

choice3 = input("選擇進入>>>3:")

if choice3 in data[choice][choice2]:

for i4 in data[choice][choice2][choice3]: #第四層

print("\t",i4)

choice4 = input("最后一層，按b返回>>:")

if choice4 == ‘b‘:

pass #pass什么也不做，為了讓代碼不出錯，占位符

elif choice4 == ‘q‘:

exit_flag =True

if choice3 == ‘b‘:

break

elif choice3 == ‘q‘:

exit_flag = True

if choice2 == ‘b‘: break elif choice2 == ‘q‘: exit_flag = True

總結

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