为什么当我已经设置了规则时它会弹出错误？

Question

我已经设置了如果体重和身高不是整数，请用户重新输入。但它弹出：“ValueError：以 10 为底的 int() 的无效文字”。感谢您的帮助


while type(weight) != int and type(height) != int and weight not in weightrange and height not in heightrange:

        weight = int(input("Enter a weight number please (kg): "))

        height = int(input("Enter a height number please (cm): "))

Answer 1

我要插话了，因为我认为你走错了路。你必须记住，事情是按顺序执行的，从上到下。你不能“建立规则”并希望将来会应用该规则。 Python 只是行不通。有些语言有，Python 没有。

while True:
    weight = input("Enter a weight number please (kg): ")
    if weight.isdigit():
        weight = int(weight)
        if weight in weightrange:
            break
        else:
            print( "Weight not in range.")
    else:
        print( "Please enter an integer.")
while True:
    height = input("Enter a height number please (cm): ")
    if height.isdigit():
        height = int(height)
        if height in heightrange:
            break
        else:
            print( "Height not in range.")
    else:
        print( "Please enter an integer.")

如果你真的这样做，你可能会创建一个函数来避免输入两次。

Answer 2

就这么办，

while True:
  try:
    weight = int(input("Enter a weight number please (kg): "))
    height = int(input("Enter a height number please (cm): "))
    break
    
  except:
    print("Invalid Input")

您也可以修改它以适合您的身高和体重范围。

为什么当我已经设置了规则时它会弹出错误？

why does it pop an error when I already set a rule in while?

python

helper

while-loop