寻找一种简单的方法来从python计时器获取剩余时间和经过时间。当前拥有(基于github上的threading.Timer和上一篇文章):
import threading
import time
class CountdownTimer(threading.Thread):
def __init__(self, interval, function, args=None, kwargs=None):
threading.Thread.__init__(self)
self.interval = interval
self.function = function
self.args = args if args is not None else []
self.kwargs = kwargs if kwargs is not None else {}
self.finished = Event()
self.started_at = None
def cancel(self):
self.finished.set()
def elapsed(self):
return time.time() - self.started_at
def remaining(self):
return self.interval - self.elapsed()
def run(self):
self.started_at = time.time()
self.finished.wait(self.interval)
if not self.finished.is_set():
self.function(*self.args, **self.kwargs)
self.finished.set()
这看起来是否合理有效(不需要超出当前线程技术的精度)?
perf_counter()
import time
start = time.perf_counter()
time.sleep(2)
finish = time.perf_counter()
print(f'Finished in {round(finish-start, 2)} second(s)')
perf_counter()的优点:
[perf_counter()
将给您比time.clock()
函数更精确的值。
从Python3.8开始,time.clock()
函数将被删除,并且将使用perf_counter
。
我们可以计算浮点数和时间的整数值(以秒和纳秒为单位。