Question

我是初学者，并在Python练习中编写了以下程序：

try:
    hours = raw_input ('Enter number of hours \n')
    int(hours)
    rate = raw_input ('Enter your hourly rate \n')
    int(rate)
except:
    print 'Enter an integer value'
    quit()
if hours > 40:
    overtime = hours - 40
    base = 40*rate
    additional = overtime * (1.5 * rate) 
    print 'Your total wage including overtime is', additional + base
else:
    wage = rate * hours
    print 'Your total wage before tax is', wage

但是，我收到了TypeError in line 10 that reads unsupported operand type(s) for -: 'str' and 'int'

奇怪的是，当我输入小时数为10并且评为5时，它应该跳过第一个if语句并直接跳到其他地方......但由于某些原因不会发生。此外，当我在没有尝试和除了位的情况下制作相同程序的第一个版本时：

hours = float(raw_input('Enter number of hours \n'))
rate = float(raw_input('Enter your hourly rate \n'))
if hours > 40:
    overtime = hours - 40
    base = 40*rate
    additional = overtime * (1.5 * rate) 
    print 'Your total wage including overtime is', additional + base
else:
    wage = rate * hours
    print 'Your total wage before tax is', wage

这很好用。

Answer 1

int(hours)不在原位。来自docs

返回从数字或字符串x构造的整数对象，如果没有给出参数，则返回0

您需要将其重新分配回变量

hours = int(hours)

Answer 2

您从字符串到 int 的转换不会保存到小时。要做到这一点，请执行以下操作：

hours=int(hours) # this is in the 3rd line of your code. Do the same for rate

尝试使用Python中的条件除外

2 个答案: