As shown below:
data = {
"Beijing":{
"Changping":{"Shahe":["oldboy","test"],"Tiantongyuan":["Link Real Estate","I love my home"]},
"Chaoyang":{"Wangjing":["Benz","Momo"],"International Trade":["CICC","HP"],"Dongzhimen":["advent","Fei Xin"]},
"Haidian":{}
},
"Shandong":{
"Texas":{},
"Qingdao":{},
"Jinan":{}
},
"Guangdong":{
"Dongguan":{},
"Changshu":{},
"Foshan":{}
}
}
exit_flag = False
while not exit_flag:
for i in data:
print(i)
choice_s = input("Please enter the name of any of the above provinces or municipalities>>>:")
if choice_s in data:
while not exit_flag:
for i in data[choice_s]:
print("\t",i)
choice_q = input("Please enter any of the above city names>>>:")
if choice_q in data[choice_s]:
while not exit_flag:
for i in data[choice_s][choice_q]:
print("\t\t",i)
choice_j = input("Please enter any of the above street names>>>:")
if choice_j in data[choice_s][choice_q]:
for i in data[choice_s][choice_q][choice_j]:
print("\t\t",i)
last = input("The last layer, press b to return >>>:")
if last == "b":
pass
elif last == "q":
exit_flag = True
if choice_j == "b":
break
elif choice_j == "q":
exit_flag = True
if choice_q == "b":
break
elif choice_q == "q":
exit_flag = True
Key points:
1. Dictionary hierarchical relationship
2. Break terminates this loop, pass does nothing, just a placeholder
3. Cleverly use exit_flag = False
The above article on the Python dictionary implementation of a simple three-level menu (example explanation) is all the content I share with you. I hope you can give you a reference and I hope you can support me more.