如何限制while循环中的输入需要认真研究

Question

如何限制srj im在1和0之间的输入，它只是重新启动整个程序

def gen0():      # input all the initial data
    while True:  # this will loop infinitely if needed
        try:     # this will try to take a float from the user
            j=int(input('how many juveniles are there in generation 0? '))
            srj=float(input('what is the survival rate of juveniles '))
            break             # if the user gives a number then break the loop
        except ValueError:    #if the user does not give a number then the user will be told to retry
            print("Sorry, there was an error. Please enter a positive number")

Answer 1

由于您在theN / try内，如果数据不正确，您可以简单地except raise。

ValueError

Answer 2

将if语句if srj > 1 or srj < 0:gen0()放在break行之前 ：^）