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python - 线性 else if 语句，我如何将其转换为重构代码

问题描述

顺便说一句，“anykey”尚未使用

def load1(): print( "请选择您的地区\n 1 代表地区 1\n 2 代表 CAR \n 3 代表地区 II\n 4 代表地区 III\n 5 代表地区 IV\n 6 代表 NCR\n 7 代表区域 V\n 区域 VI 为 8\n 区域 VII 为 9\n 区域 VII 为 10\n 区域 VIII 为 11\n 区域 VIII 为 12\n 区域 IX 为 13\n 区域 X 为 14\n 区域 XI 为 15") option = int(input("Your option: ")) # 作用类似于 switch if option == "1": print("Region 1\n") csv_file = csv.reader(open('file/Region I.csv' , 'r')) for row in csv_file: print(row) anykey = input("Press any key to return from main menu") mainMenu()

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()

标签： python

解决方案

如果您希望您的选择在字典中，请将函数名称存储在其中，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

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