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28 lines
707 B
28 lines
707 B
6 years ago
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import signal
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class TimeoutException(Exception):
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pass
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class Timeout:
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"""
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Timeout context manager.
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For example this code will raise a TimeoutException:
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with Timeout(seconds=5, error_msg="Sleep was too long"):
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time.sleep(10)
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"""
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def __init__(self, seconds, error_msg=None):
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if error_msg is None:
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error_msg = 'Timed out after {} seconds'.format(seconds)
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self.seconds = seconds
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self.error_msg = error_msg
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def handle_timeout(self, signume, frame):
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raise TimeoutException(self.error_msg)
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def __enter__(self):
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signal.signal(signal.SIGALRM, self.handle_timeout)
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signal.alarm(self.seconds)
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def __exit__(self, exc_type, exc_val, exc_tb):
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signal.alarm(0)
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