Question

import datetime

class Time:
    def __init__(self, init_hr = 10, init_min = 30, init_ampm = "AM"):
    """
    initializes the hour, the minute, and a string indicating
    whether it's an AM or PM time
    """

        if init_hr < 1 or init_hr > 12:
            raise Exception("Error: Invalid hour for Time object")
        if init_min < 0 or init_min > 59:
            raise Exception("Error: Invalid minute for Time object")
        init_ampm = init_ampm.upper()
        if init_ampm != "AM" and init_ampm != "PM":
            raise Exception("Error: Invalid am/pm flag for Time object")
        self.hr = init_hr
        self.min = init_min
        self.ampm = init_ampm

def __add__(self, mins):
    """
    Returns the sum of a Time instance and a non-negative integer mins
    """ 
    if mins // 60 and self.hr < 12:
        div = mins // 60
        add = self.hr + div
        mod = mins % 60
        add2 = self.min + mod
        string = Time(add, add2)
        return string
    elif mins // 60 and self.hr == 12:
        div = mins // 60
        addsub = self.hr + div - 12
        mod = mins % 60
        add2 = self.min + mod
        string = Time(addsub, add2)
        return string

当我测试添加功能时，它给了我这个错误：

    Traceback (most recent call last):
  File "C:\Python34\problem2.py", line 313, in <module>
    print("645 minutes after   ", t3, " the time is", t3 + 645)
  File "C:\Python34\problem2.py", line 100, in __add__
    string = Time(add, add2)
  File "C:\Python34\problem2.py", line 18, in __init__
    raise Exception("Error: Invalid hour for Time object")
Exception: Error: Invalid hour for Time object

不确定为什么它会给我这个错误，但是在午夜之后，这个错误总会发生。任何解决方案？

Answer 1

if init_hr＆lt; 1或init_hr＆gt; 12：条件正在解雇。这是因为add = self.hr + div大于12 ---＆＃34;午夜后＃34;。您可能希望使用模运算符来帮助回绕。似乎你开始计时1.所以...（时间％12）+ 1

添加有问题

1 个答案: