while循环中python3.x和python2.x的区别

我有一段代码,是我几周前写的。最初我是为Python2.7编写的,它运行得非常好,但不久前我决定放弃它,转而使用Python3.7。有人能解释一下为什么会这样吗 while

在Python2.7中,这段代码允许我在数据文件之间浏览,代码中的那些业余技巧允许我处理诸如60分钟后更改小时或24小时后更改日期之类的障碍。仍然不知道如何将其转换为python3。

# Input variables
h = "Arctic"
u = 'Denver'
p = 'Patagonia'

Station = input('Enter a station name (Arctic = h, Denver = u, Patagonia = p): ')
Date = input('Enter date time (yyyymmdd): ')
Date_end = input('Enter end date time (yyyymmdd): ')
Start_time_hours = int(input('Enter start time (hh): '))
Start_time_minutes = int(input('Enter start time (mm): '))
End_time_hours = int(input('Enter end time (hh): '))
End_time_minutes = int(input('Enter end time (mm): '))
Save_Print_SavPrin = input('Press s = Save, p = Plot: ')


while Start_time_hours == Start_time_hours and Start_time_minutes == Start_time_minutes and Date == Date:
    Start_time_hours += (Start_time_minutes / 60)
    Start_time_minutes %= 60
    str(Start_time_minutes)
    str(Start_time_hours)
    str(End_time_minutes)
    str(End_time_hours)
    Start_time_hours_format = '{:02}'.format(Start_time_hours)
    Start_time_minutes_format = '{:02}'.format(Start_time_minutes)
    End_time_hours_format = '{:02}'.format(End_time_hours)
    End_time_minutes_format = '{:02}'.format(End_time_minutes)
    int(Start_time_minutes)
    Start_time_minutes += 5
    if Save_Print_SavPrin == "p":
        print("Showing figures...")
        print ("Succesful!")
        if Start_time_hours_format == End_time_hours_format and Start_time_minutes_format == End_time_minutes_format and Date == Date_end:
            print (Start_time_hours_format, Start_time_minutes_format, End_time_hours_format, End_time_minutes_format)
            break