Python Job 5: Multilevel Menu

# Job 5: Multilevel Menu
#   level Three menu, province, city, county, company, ask the program to start, allow the user to choose to go to each sub-menu
#   You can return to the parent menu at any level menu, or you can exit the program
#   new Knowledge points required: list, dictionary
#
Ideas
# Create a dictionary, three-layer nested dictionary
#逐层提取key字段,
#先不管各种可能, to write the main program, that is, a variety of choices are good conditions can be realized, and then add a variety of possible
#这个地方其实是重点考察while循环里面的continue和break
#出于程序简化, does not consider the input of the digital range, input is not a number, q, B, the case of three

Dict1={        "Save 1":{            "City One":{                "County 111":{                    "Company 1111:{}",                    "Company 1112:{}"                },                "County":{                    "Company 1121:{}",                    "Company 1122:{}"                }            },            "City":{                "County 121":{                    "Company 1211:{}",                    "Company 1212:{}"                },                "County 122":{                    "Company 1221:{}",                    "Company 1222:{}"                }            },            "City":{                "County 131":{},"County":{}            }        },        "Save 2":{            "City":{                "County 211":{},"County 212":{}            },            "City":{                "County 221":{},"County 222":{}            },            "City":{                "County 231":{},"County 232":{}            }        },        "Save 3":{            "City":{                "County 311":{},"County 312":{}            },            "City":{                "County 321":{},"County 222":{}            },            "City":{                "County 331":{},"County 332": {}}}}judge=True whileJudge:list1=list (Dict1.keys ()) List1.sort ()Print("The level_1 menu:")     forIndex,iteminchEnumerate (list1):Print(index,item) Choice1= Input ("Please choose Level_1:")    ifchoice1.isdigit (): Choice1=Int (choice1) choice_key1=List1[choice1] List2=list (Dict1.get (choice_key1)) List2.sort () whileJudge:Print("The level_2 menu:")             forIndex, iteminchEnumerate (list2):Print(Index, item) CHOICE2= Input ("Please choose level_2:")            ifchoice2.isdigit (): Choice2=Int (choice2) Choice_key2=List2[choice2] List3=list (Dict1.get (choice_key1). Get (Choice_key2)) List3.sort () whileJudge:Print("The level_3 menu:")                     forIndex, iteminchEnumerate (LIST3):Print(Index, item) Choice3= Input ("Please choose Level_3:")                    ifchoice3.isdigit (): Choice3=Int (choice3) Choice_key3=List3[choice3] List4=list (Dict1.get (choice_key1). Get (Choice_key2). Get (Choice_key3)) List4.sort () Print("The level_4 menu:")                         forIndex, iteminchEnumerate (LIST4):Print(Index, item) Choice4= Input ("It ' s The last level,please come back:")                        ifChoice4 = ="Q":                            #when the position is empty, you can jump out of multiple loops continuouslyJudge =False#here is all the loops that jump out of this while loop                             Break                        elifChoice4 = ="b":                            #This just jumps out of a loop in this while loop .                            Continue                    elifChoice3 = ="Q": Judge=False Break                    elifChoice3 = ="b":                         Break            elifChoice2 = ="Q": Judge=False Break            elifChoice2 = ="b":                 Break    elifChoice1 = ="Q":#is the Q exitJudge =FalseElse:#not Q nor number, re-elect        Print("Please choose the number .")

Python Job 5: Multilevel Menu