Question

else语句捕获到无效输入后，即使该输入应为有效输入，也将在将其捕获为无效输入之后向用户提供建议。另外，我对Python还是很陌生，因此，对其余代码的任何建议将不胜感激。下面是我编写的代码：

from __future__ import division #Allows for division to return a float value
from colorama import init,Fore,Style,Back #Allows for formating color and stylizing text output to terminal screen
init(convert=True) #Allows Colorama to work on Windows 10 machine
import os

running=True

def printAnswer(sign,userInput1,userInput2,answer):
    "Prints the formated answer to the screen"
    print
    print Fore.RED, Style.BRIGHT,userInput1, sign, userInput2, "=", answer, "\n" #Changes text to red
    print Style.RESET_ALL #Changes text back to normal from Red
    try:
        input= raw_input("Press any key to continue")
    except NameError:
        pass

def printAnswerRemainder(sign,userInput1,userInput2,answerInt,remainder):
    "Prints the formated division answer with remainder"
    print Fore.Red, Style.BRIGHT, "\n", userInput2, sign, userInput1, "=", answerInt," Remainder ", remainder, "\n" #Changes text color to red
    print Style.RESET_All #Resets text color back to normal


def newAdd(userInput1,userInput2):
    "Performs the addition function"
    sign="+"
    answer=userInput1+userInput2
    printAnswer(sign,userInput1,userInput2,answer)

def newSub(userInput1,userInput2):
    "Performs the Subtraction function"
    sign="-"
    answer=userInput1-userInput2
    printAnswer(sign,userInput1,userInput2,answer)

def newDivision(userInput1, userInput2):
    "Performs divsion function giving a decimal answer and an answer with the remainder"
    sign="/"
    answer=userInput2/userInput1
    answerInt=userInput2//userInput1
    remainder=userInput2%userInput1
    printAnswerRemainder(sign,userInput1,userInput2,answerInt,remainder)
    printAnswer(sign, userInput2, userInput1, answer)


def newMult(userInput1,userInput2):
    sign="X"
    answer=userInput1*userInput2
    printAnswer(sign,userInput1,userInput2,answer)

while running==True: 
    os.system('cls' if os.name == 'nt' else 'clear') #Clears the terminal of previous activity
    userSelect=raw_input("Please enter the number of the type of operation you would like to complete:\n\t 1.Addition\n\t 2.Subtraction\n\t 3.Division\n\t 4.Multiplication\n\t 5.Exit\n\n-------> ")

    if userSelect=="1":
        addNum1=input("Enter the first number to add:\n")
        addNum2=input("Enter the second nummebr to add:\n")
        newAdd(addNum1,addNum2)

    elif userSelect=="2":
        subNum1=input("Enter the number to subtract from: \n")
        subNum2=input("Enter the number you would like to subtract: \n")
        newSub(subNum1,subNum2)

    elif userSelect=="3":
        divNum1=input("Enter the dividend: \n")
        divNum2=input("Enter the divisor: \n")
        newDivision(divNum2,divNum1)
    elif userSelect=="4":
        multNum1=input("Enter the number that is being multiplied: \n")
        multNum2=input("Enter the number to be multiplied by: \n")
        newMult(multNum1,multNum2)
    elif userSelect=="5":
        running=False
    **else:
        print "The command was invalid"
        try:
            input= raw_input("Press any key to continue")
        except NameError:
            pass**

Answer 1

在此else子句中，您将覆盖内置函数input：

    try:
        input= raw_input("Press any key to continue")

相反，这应该可以正常工作：

    try:
        anykey = raw_input("Press any key to continue")

在else语句捕获无效输入之后，不接受有效输入

1 个答案: