线性else if语句，如何将其转换为重构代码

Question

顺便说一句，“任意键”未被使用

def load1（）： 印刷品( “请选择区域1 \n 1，对于区域1 \n 2，对于区域II\n 4，对于区域II\n 5，对于区域IV\n 6，对于区域VI\n 7，对于区域VI\n 7，对于区域Vi n 8，对于区域Vi \n 9，对于区域VII \n 10，对于CavaGr\Gn的区域VIII \n 11，对于区域IX\n的CiaGa \n，区域X\n，x为区域席“”。 option=int（输入（“您的选项：”） #动作像开关 如果选项==“1”： 打印（“区域1\n”） csv_file=csv.reader（打开（'file/Region I.csv'，'r'）） 对于csv_文件中的行： 打印（行） 任意键=输入（“按任意键从主菜单返回”） 主菜单（）

elif option == "2":
    print("CAR\n")
    csv_file = csv.reader(open('file/CAR.csv', 'r'))
    for row in csv_file:
        print(row)
    anykey = input("Press any key to return from main menu")
    mainMenu()

elif option == "3":
    print("Region 2\n")
    csv_file = csv.reader(open('file/Region II.csv', 'r'))
    for row in csv_file:
        print(row)
    anykey = input("Press any key to return from main menu")
    mainMenu()

elif option == 4:

    print("Region 3\n")
    csv_file = csv.reader(open('file/Region III.csv', 'r'))
    for row in csv_file:
        print(row)
    anykey = input("Press any key to return from main menu")
    mainMenu()

elif option == 5:
    print("Region 4\n")
    csv_file = csv.reader(open('file/Region IV.csv', 'r'))
    for row in csv_file:
        print(row)
    anykey = input("Press any key to return from main menu")
    mainMenu()

elif option == 6:
    print("NCR 4\n")
    csv_file = csv.reader(open('file/NCR.csv', 'r'))
    for row in csv_file:
        print(row)
        print()
    anykey = input("Press any key to return from main menu")
    mainMenu()

elif option == 7:
    print("Region 5\n")
    csv_file = csv.reader(open('file/Region V.csv', 'r'))
    for row in csv_file:
        print(row)
    anykey = input("Press any key to return from main menu")
    mainMenu()

elif option == 8:
    print("Region 6\n")
    csv_file = csv.reader(open('file/Region VI.csv', 'r'))
    for row in csv_file:
        print(row)
    anykey = input("Press any key to return from main menu")
    mainMenu()

elif option == 9:
    print("Region 7\n")
    csv_file = csv.reader(open('file/Region VII.csv', 'r'))
    for row in csv_file:
        print(row)
    anykey = input("Press any key to return from main menu")
    mainMenu()

elif option == 10:
    print("SOCCSKARGEN\n")
    csv_file = csv.reader(open('file/SOCCSKARGEN.csv', 'r'))
    for row in csv_file:
        print(row)
    anykey = input("Press any key to return from main menu")
    mainMenu()

elif option == 11:
    print("Region 8\n")
    csv_file = csv.reader(open('file/Region VIII.csv', 'r'))
    for row in csv_file:
        print(row)
    anykey = input("Press any key to return from main menu")
    mainMenu()

elif option == 12:
    print("CARAGA\n")
    csv_file = csv.reader(open('file/CARAGA.csv', 'r'))
    for row in csv_file:
        print(row)
    anykey = input("Press any key to return from main menu")
    mainMenu()

elif option == 13:
    print("Region 9\n")
    csv_file = csv.reader(open('file/Region IX.csv', 'r'))
    for row in csv_file:
        print(row)
    anykey = input("Press any key to return from main menu")
    mainMenu()

elif option == 14:
    print("Region 10\n")
    csv_file = csv.reader(open('file/Region X.csv', 'r'))
    for row in csv_file:
        print(row)
    anykey = input("Press any key to return from main menu")
    mainMenu()

elif option == 15:
    print("Region 11\n")
    csv_file = csv.reader(open('file/Region XI.csv', 'r'))
    for row in csv_file:
        print(row)
    anykey = input("Press any key to return from main menu")
    mainMenu()

Answer 1

如果希望选择的内容包含在字典中，请将函数名存储在字典中，然后调用它们：

# load(), search() and mainMenu() are defined above somewhere

def print_and_exit():
    print("Thank you for using the program.")
    exit()

def invalid_choice():
    print("Invalid choice, please select from 1 to 3")
    mainMenu()

selections={"1":load1, "2":search, "3":print_and_exit}

def select(selection):
    # call the function associated with the selection, or indicate that an invalid choice was made
    selections.get(selection, invalid_choice)()  # invalid_choice() is called if the choice is not in the selections dictionary