错误提示而不是提示重新输入输入

Question

我正在制作一个价格合适的游戏。我目前正在开发一种类似于参赛者行的游戏模式，他们在其中猜测物品的价格。

当它要求您提交投标时，如果您输入一个单词（而不是投标），程序会崩溃并显示以下错误：

"Traceback（最近一次调用最后一次）： 文件“C:\Users\alexe\AppData\Local\Programs\Python\Python36\Thepriceisright.py”，第 36 行，在 参赛者（） 参赛者行中的文件“C:\Users\alexe\AppData\Local\Programs\Python\Python36\Thepriceisright.py”，第 24 行 protagnum=int(input(propername +", 你的出价是多少？")) ValueError: int() 以 10 为底的无效文字：'alexei'"

这是我的代码：

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”会起作用，但“a”会引发 ValueError

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