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from time import time
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class TimerError(Exception):
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def __init__(self, message):
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self.message = message
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super(TimerError, self).__init__(message)
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class Timer:
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"""A flexible Timer class.
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:Example:
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>>> import time
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>>> import annotator.uniformer.mmcv as mmcv
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>>> with mmcv.Timer():
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>>> # simulate a code block that will run for 1s
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>>> time.sleep(1)
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1.000
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>>> with mmcv.Timer(print_tmpl='it takes {:.1f} seconds'):
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>>> # simulate a code block that will run for 1s
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>>> time.sleep(1)
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it takes 1.0 seconds
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>>> timer = mmcv.Timer()
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>>> time.sleep(0.5)
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>>> print(timer.since_start())
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0.500
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>>> time.sleep(0.5)
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>>> print(timer.since_last_check())
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0.500
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>>> print(timer.since_start())
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1.000
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"""
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def __init__(self, start=True, print_tmpl=None):
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self._is_running = False
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self.print_tmpl = print_tmpl if print_tmpl else '{:.3f}'
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if start:
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self.start()
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@property
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def is_running(self):
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"""bool: indicate whether the timer is running"""
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return self._is_running
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def __enter__(self):
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self.start()
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return self
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def __exit__(self, type, value, traceback):
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print(self.print_tmpl.format(self.since_last_check()))
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self._is_running = False
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def start(self):
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"""Start the timer."""
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if not self._is_running:
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self._t_start = time()
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self._is_running = True
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self._t_last = time()
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def since_start(self):
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"""Total time since the timer is started.
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Returns (float): Time in seconds.
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"""
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if not self._is_running:
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raise TimerError('timer is not running')
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self._t_last = time()
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return self._t_last - self._t_start
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def since_last_check(self):
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"""Time since the last checking.
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Either :func:`since_start` or :func:`since_last_check` is a checking
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operation.
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Returns (float): Time in seconds.
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"""
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if not self._is_running:
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raise TimerError('timer is not running')
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dur = time() - self._t_last
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self._t_last = time()
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return dur
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_g_timers = {}
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def check_time(timer_id):
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"""Add check points in a single line.
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This method is suitable for running a task on a list of items. A timer will
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be registered when the method is called for the first time.
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:Example:
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>>> import time
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>>> import annotator.uniformer.mmcv as mmcv
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>>> for i in range(1, 6):
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>>> # simulate a code block
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>>> time.sleep(i)
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>>> mmcv.check_time('task1')
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2.000
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3.000
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4.000
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5.000
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Args:
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timer_id (str): Timer identifier.
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"""
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if timer_id not in _g_timers:
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_g_timers[timer_id] = Timer()
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return 0
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else:
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return _g_timers[timer_id].since_last_check()
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