Python 日期、小时、分钟和秒的倒数计时器

Question

在 this link 的第二个示例中，我找到了一个倒数计时器，但它只能工作几分钟和几秒钟，我怎样才能让它工作数小时和数天。这是代码

import time 

def countdown(t): 

    while t: 
        mins, secs = divmod(t, 60) 
        timer = '{:02d}:{:02d}'.format(mins, secs) 
        print(timer, end="\r") 
        time.sleep(1) 
        t -= 1

    print('Fire in the hole!!') 

t = 10

countdown(int(t))

Answer 1

导入时间

默认倒计时（t）：

while t: 
    mins, secs, days = divmod(t, 60, 365) 
    timer = '{:02d}:{:02d}:{:02d}'.format(mins, secs, days) 
    print(timer, end="\r") 
    time.sleep(1) 
    t -= 1

print('Fire in the hole!!')

t = 10

倒计时（整数（t））

Answer 2

倒计时所做的就是每秒从t减1，计时器以正确的格式显示相应的时间。您可以像这样更改格式：

import time 

def countdown(t): 

    while t:
        mins, secs = divmod(t, 60)
        hours, mins = divmod(mins, 60) # divide number of minutes by 60 to get hours
        days, hours = divmod(hours, 24) # divide number of hours by 24 to get days
        timer = '{:02d}:{:02d}:{:02d}:{:02d}'.format(days, hours, mins, secs) 
        print(timer, end="\r") 
        time.sleep(1) 
        t -= 1

    print('Fire in the hole!!') 

t = 10

countdown(int(t))

Answer 3

要事第一：

将 .sleep() 用作计时器不是一个好主意。 Sleep() 没有考虑运行代码所需的时间。所以你实际上得到的不是一秒钟，而是 code execution time + .sleep() + code execution time。这意味着如果将此代码发送给某人，它将根据他们的机器执行代码的速度进行不同的计算。

如果您有兴趣制作精确的内容，请查看和此主题。

至于我们的问题，您只需要格式化输出：

def countdown(t): 
    """
    Countdown Timer
    """
    while t:
        # Divmod takes only two arguments so
        # you'll need to do this for each time
        # unit you need to add
        mins, secs = divmod(t, 60) 
        hours, mins = divmod(mins, 60)
        days, hours = divmod(hours, 24)
        timer = '{:02d}:{:02d}:{:02d}:{:02d}'.format(days, hours, mins, secs) 
        print(timer, end="\r") 
        time.sleep(1) 
        t -= 1

    print('Fire in the hole!!') 

t = 10

countdown(int(t))

这里是一个小例子，说明如果您测量很长一段时间，这些小差异会累积起来。

import time

start_time = time.time()

def countdown(t): 
    """
    Countdown Timer
    """
    while t:
        # Divmod takes only two arguments so
        # you'll need to do this for each time
        # unit you need to add
        mins, secs = divmod(t, 60) 
        hours, mins = divmod(mins, 60)
        days, hours = divmod(hours, 24)
        timer = '{:02d}:{:02d}:{:02d}:{:02d}'.format(days, hours, mins, secs) 
        print(timer, end="\r" )
        time_before_sleep = time.time() - start_time
        time.sleep(1) 
        time_after_sleep = time.time() - start_time
        print(timer, time_before_sleep, time_after_sleep)
        t -= 1
        
    print('Fire in the hole!!') 

t = 10

countdown(int(t))

输出：

00:00:09 1.0045790672302246 2.0046610832214355
00:00:08 2.0047121047973633 3.0048279762268066
00:00:07 3.0049359798431396 4.005050897598267
00:00:06 4.005151033401489 5.005663156509399
00:00:05 5.005772113800049 6.006514072418213
00:00:04 6.006554126739502 7.007684946060181
00:00:03 7.007725238800049 8.008012056350708
00:00:02 8.00806212425232 9.00907301902771
00:00:01 9.009180068969727 10.010266065597534

Python 日期、小时、分钟和秒的倒数计时器

Python count down timer for date, hour, minute and second

python

countdowntimer