def _do(p: redis.client.Pipeline, number):
p.watch(number)
if p.get(number):
raise AlreadyExistException('Number already exists')
elif p.get(number + 1):
raise OneLessThatItWasException('Number is 1 less than required')
p.execute()
p.unwatch()
p.set(number, 'True')
p.execute()
def transaction_method(pipe: redis.client.Pipeline) -> None:
value = pipe.get(db_key)
if value is not None and \
value.decode("utf-8") == expected_report_key:
pipe.delete(db_key)