如何在python上创建一个计时器

Question

我正在创建一个代码，要求程序计算运行的时间，然后显示时间。 它基本上是一个在后台运行的计时器，我可以调用它来显示代码运行的时间。 我该怎么做呢？

Answer 1

您记录开始时间，然后计算开始时间和当前时间之间的差异。

由于平台差异，为了精确，您要使用timeit.default_timer callable ：

from timeit import default_timer

start = default_timer()

# do stuff

duration = default_timer() - start

这为您提供了挂钟持续时间（以秒为单位）作为浮点值。

演示：

>>> from timeit import default_timer
>>> start = default_timer()
>>> # Martijn reads another post somewhere
... 
>>> print default_timer() - start
19.1996181011

Answer 2

这在python中很容易

import time
start_time=time.time()
#do something
end_time=time.time()-start_time

结果end_time将以秒为单位

Answer 3

我这样做了，这可能对你有帮助

from timeit import default_timer

timerPool = {}
TIMER_RUNNING = 1
TIMER_STOPPED = 0
TIMER_IDLE = 2


"""
Initilialize the timer like below if any new timer to be added
"""
"""
required initialization for "eightSecTimer_Id" timer
"""
timerPool['eightSecTimer_Id'] = {}
timerPool['eightSecTimer_Id']['state'] = TIMER_IDLE
timerPool['eightSecTimer_Id']['start'] = 0
timerPool['eightSecTimer_Id']['duration'] = 0
timerPool['eightSecTimer_Id']['time'] = 0

"""
required initialization for "fiveSecTimer_Id" timer
"""
timerPool['fiveSecTimer_Id'] = {}
timerPool['fiveSecTimer_Id']['state'] = TIMER_IDLE
timerPool['fiveSecTimer_Id']['start'] = 0
timerPool['fiveSecTimer_Id']['duration'] = 0
timerPool['fiveSecTimer_Id']['time'] = 0

"""
Interface to start the timer
"""
def StartTimer(Id,time):
    timerPool[Id]['time'] = time
    timerPool[Id]
    if (timerPool[Id]['state'] == TIMER_IDLE) or (timerPool[Id]['state'] == TIMER_STOPPED):
        timerPool[Id]['start'] = default_timer()
        timerPool[Id]['state'] = TIMER_RUNNING
    return timerPool[Id]['state']

"""
Interface to get the timer status.
Return "TIMER_STOPPED" when timer completed
Return "TIMER_IDLE" after timer completed on consecutive call of this function
"""

def GetTimerState(Id):
    time = timerPool[Id]['time']
    if timerPool[Id]['state'] == TIMER_RUNNING:
        timerPool[Id]['duration'] = default_timer() - timerPool[Id]['start']
    else:
        None
    if timerPool[Id]['state'] == TIMER_STOPPED:
        timerPool[Id]['state'] = TIMER_IDLE

    if  timerPool[Id]['duration'] >= time:
        timerPool[Id]['state'] = TIMER_STOPPED
        timerPool[Id]['duration'] = 0
    return timerPool[Id]['state'] 

"""
Below is how to use.
"""
StartTimer('fiveSecTimer_Id',5)
StartTimer('eightSecTimer_Id',8)

while True:
    if GetTimerState('fiveSecTimer_Id') == TIMER_STOPPED:
        print "5 sec Timer Stopped"
    if GetTimerState('eightSecTimer_Id') == TIMER_STOPPED:
        print "8 sec Timer Stopped"        
    sleep (.5)