错误提示而不是提示重新输入输入

Question

我正在制定一个价格是正确的游戏。我目前正在进行一种类似于参赛者排的游戏模式，他们在那里猜测一件物品的价格。

当它要求您提交一个出价时，如果您输入一个单词(而不是bid)，程序就会崩溃，并显示以下错误：

“回溯(最近一次调用)：文件"C:\Users\alexe\AppData\Local\Programs\Python\Python36\Thepriceisright.py"，第36行，contestantrow() "C:\Users\alexe\AppData\Local\Programs\Python\Python36\Thepriceisright.py"，第24行，contestantrow protagnum=int(输入(propername+，您的出价是多少？”) ValueError:带基数10：‘alexei’的无效文字int()

这是我的密码：

import random
print(" The Price is Sorta Right - 000776331")
welcomeplayer = True
contestantrow = True
def welcome():
    while True:
        global welcomeplayer
        global propername
        welcomeplayer =  input("Please enter your name using only letters")
        validname = welcomeplayer.isalpha()
        propername = welcomeplayer.capitalize()
        if validname == True:
            print( propername, " ! Come on down! You're the next contestant on the Price is (sorta) right")
            print (" Dew Drop welcomes " ,propername ," to contestants row joining EIMNOT A. HUMAN,ARTHURFICIAL EINTEL , ROBORT")
            return
        else:
            print("Please only write letters on your name tag")
            welcomeplayer = False

def contestantrow():
    while True:

        print("Dew Drop shows the price that you are bidding on")
        protagnum=int(input(propername +", what is your bid?"))
        if protagnum > 0:
            componebid = random.randint(1,1000)
            print("EIMNOT A. HUMAN bids: ",componebid)
            comptwobid = random.randint(1,1000)
            print("ARTHURFICIAL EINTEL bids: ",comptwobid)
            compthreebid =random.randint(1,1000)
            print("ROBORT bids: ",compthreebid)
        else:
            print(" Dew Drop says [Im sorry bids should start at atleast one dollar]")
            contestantrow = False
welcome()
contestantrow()

Answer 1

protagnum=int(input(propername +", what is your bid?"))

您正在将int / string转换为int。"1“将起作用，但"a”将引发ValueError

while True:
    try:
        protagnum=int(input(propername +", what is your bid?"))
        break
    except ValueError:
        print("Invalid bid, please try again")