Python - 输入过滤器[重复]

Question

这是my other thread on 10 Green Bottles 的后续行动。我现在想知道如何让我的输入只接受一些单词/数字。如果输入了错误的单词/数字，它会提示您再次输入。如果输入的单词匹配是一个接受的单词，它会传递并运行其余的代码。 代码：

def main():
    num1=int(input('Pick a number between 10 and 30: '))
    hue=str(input('Pick a colour; Red, Green, Blue: '))

    numbers =[ 'no', 'One', 'Two', 'Three', 'Four', 'Five', 'Six', 'Seven', 'Eight', 'Nine', 'Ten', 'Eleven', 'Twelve', 'Thirteen', 'Fourteen', 'Fifteen', 'Sixteen', 'Seventeen', 'Eighteen', 'Nineteen', 'Twenty', 'Twentyone', 'Twentytwo', 'Twentythree', 'Twentyfour', 'Twentyfive', 'Twentysix', 'Twentyseven', 'Twentyeight', 'Twentynine', 'Thirty' ]
    text_one = hue +' bottle%s\nHanging on the wall'
    text_two = "And if one " + hue + " bottle\nShould accidentally fall\nThere'll be"
    text_three =' \n'


    with open(numbers[num1] + ' ' + hue + ' Bottles.txt', 'w') as a:
        for l in range(num1, 0, -1):                                              #
            a.write(numbers[l]+ ' ')
            if l == 1:
                a.write(text_one % '' +'\n')
            else:
                a.write(text_one % 's' +'\n')

            a.write(numbers[l] + ' ')
            if l == 1:
                a.write(text_one %  '' + '\n') 
            else:
                a.write(text_one % 's' +  '\n')
            a.write(text_two + ' ')
            a.write(numbers[l-1] + ' ')
            if (l - 1) ==1 :
                a.write(text_one % ''+'\n')
            else:
                a.write(text_one % 's'+'\n')
            a.write('\n' + '\n')



if __name__ == '__main__':
    main()

Answer 1

简单while:

while True:
    try:
        msg = int(input("Enter: "))
    except ValueError:
        print("Not Valid!")
        continue
    # do some validation like if msg.endswith('hi') and stuff like that ex:

    if msg > 40 or msg < 10: # fail if greater than 40 and smaller than 10
        print("Not Valid!")
        continue
    break