인프런 커뮤니티 질문&답변
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#Context Manager and Contextlib, __enter__,__exit__
#Ex1
import time
class ExcuteTimer(object):
def __init__(self,msg):
self._msg=msg
def __enter__(self):
self._start=time.monotonic()
return self._start
def __exit__(self,exc_type,exc_value,exc_traceback):
if exc_type:
print("Logging exception {}".format((exc_type,exc_value,exc_traceback)))
else:
print("{} {} s".format(self._msg, time.monotonic()-self._start))
return True
with ExcuteTimer('Start! job') as v:
print('Received start monotonic1:{}'.format(v))
for i in range(1000000):
pass
raise Exception('Raise! Exception!')
