class Logger(object):
    def __init__(self, i):
        self.msgs = []
        self.id = i
    def __enter__(self):
        print('BEGIN', self.id)
        return self.msgs
    def __exit__(self, exc_type, exc_value, traceback):
        print('END', self.id, exc_type, exc_value, traceback)
        for msg in self.msgs:
            print('NOTE', self.id, msg)
        return exc_type is ZeroDivisionError

for i in range(3):
    print('----')
    try:
        with Logger(i) as log:
            log.append('message {}'.format(i))
            assert 3 % i == 0
    except:
        print('Caught', i)