python - 用户输入错误格式时如何通知错误？

Question

当用户按要求插入不是整数的输入时如何通知错误？

例如：

number = int(input("Input the number: "))

我想编写如下代码：如果数字“不是”整数，那么

if number is not integers 
            print("The input was not numerical value. Please try again")
        else:
            print ("Input "+ str(number) + " elements in the list:")

你能帮助我吗。

谢谢！

标签： pythonif-statementinteger

Answer 1

try/except 语句应该很合适：

try:
    number = int(input("Input the number: "))
    print ("Input "+ str(number) + " elements in the list:")
except ValueError:
    print("The input was not numerical value. Please try again")