import time
class Timer:
def __init__(self, func=time.perf_counter):
self.elapsed = 0.0
self._func = func
self._start = None
def start(self):
if self._start is not None:
raise RuntimeError('Already started')
self._start = self._func()
def stop(self):
if self._start is None:
raise RuntimeError('Not started')
end = self._func()
self.elapsed += end - self._start
self._start = None
def reset(self):
self.elapsed = 0.0
def get_elapsed(self):
if self._start is None:
return 0.0
self.stop()
elapsed = self.elapsed
self.start()
return round(elapsed, 2)
@property
def running(self):
return self._start is not None
def __enter__(self):
self.start()
return self
def __exit__(self, *args):
self.stop()
