几分钟内的python计时器

Question

我正在尝试运行以下代码。它无法运行5分钟，请您告诉我这里的问题。我试图在后台运行它，保存为.pyw并在完成1小时后提醒我，根据计时器参数传递的内容。

import time
import ctypes
def timer(minutes):
    seconds = minutes * 60
    start = time.time()
    time.clock()
    elapsed = 0
    while elapsed < seconds:
        elapsed = time.time() - start
    time.sleep(1)
    timer(5) #would want enter in hours not in seconds
    ctypes.windll.user32.MessageBoxA(0,"DoneToday", "Dones", 0)

Answer 1

你的timer()函数无限循环。

你的while elapsed < seconds:循环后，两行下来，你已经把timer(5)。所以只是再次召唤自己，再次，再次......

删除此行后，它将按预期工作：

timer(5) #would want enter in hours not in seconds

正如@vermillon所提到的，任何理由你不只是在做time.sleep(minutes * 60)？我假设你计划在那个循环中做其他事情，而不仅仅是计算时间。

---

编辑：让OP看到正在运行的代码

>>> def timer(minutes):
...     seconds = minutes * 60
...     start = time.time()
...     time.clock()
...     elapsed = 0
...     while elapsed < seconds:
...         elapsed = time.time() - start
...     time.sleep(1)
...     ctypes.windll.user32.MessageBoxA(0,"DoneToday", "Dones", 0)
...     print 'also printing Done so you can see it'
...
>>> timer(0.1)
also printing Done so you can see it
>>>

Answer 2

如果你想要一个显示剩余分钟和秒数的计时器，那么这里是你的代码：

import time
import sys

def run_timer(seconds):
    for remaining in range(seconds, 0, -1):
        sys.stdout.write("\r")
        minutes = 0
        seconds = remaining
        if remaining > 60:
            minutes = int(seconds/60)
            seconds = int(seconds%60)
        else:
            seconds = remaining
        sys.stdout.write("{:2d} minutes {:2d} seconds remaining.".format(minutes,seconds)) 
        sys.stdout.flush()
        time.sleep(0.1)
    sys.stdout.write("Timer complete") 

run_timer(120)