old_contents: from contextlib import contextmanager, ExitStack
  
  from sdcm.sct_events import DbEventsFilter, Severity, DatabaseLogEvent, EventsSeverityChangerFilter, YcsbStressEvent, \
      PrometheusAlertManagerEvent
  
  
  @contextmanager
  def ignore_alternator_client_errors():
      with ExitStack() as stack:
          stack.enter_context(EventsSeverityChangerFilter(
              event_class=PrometheusAlertManagerEvent, regex=".*YCSBTooManyErrors.*", severity=Severity.WARNING,
              extra_time_to_expiration=60))
          stack.enter_context(EventsSeverityChangerFilter(
              event_class=PrometheusAlertManagerEvent, regex=".*YCSBTooManyVerifyErrors.*", severity=Severity.WARNING,
              extra_time_to_expiration=60))
          stack.enter_context(EventsSeverityChangerFilter(
              event_class=YcsbStressEvent, regex=r".*Cannot achieve consistency level.*", severity=Severity.WARNING,
              extra_time_to_expiration=30))
          stack.enter_context(EventsSeverityChangerFilter(
              event_class=YcsbStressEvent, regex=r".*Operation timed out.*", severity=Severity.WARNING,
              extra_time_to_expiration=30))
          yield
  
  
  @contextmanager
  def ignore_operation_errors():
      with ExitStack() as stack:
          stack.enter_context(EventsSeverityChangerFilter(
              event_class=DatabaseLogEvent, regex=r".*Operation timed out.*", severity=Severity.WARNING,
              extra_time_to_expiration=30))
          stack.enter_context(EventsSeverityChangerFilter(
              event_class=DatabaseLogEvent, regex=r'.*Operation failed for system.paxos.*', severity=Severity.WARNING,
              extra_time_to_expiration=30))
          yield
  
  
  @contextmanager
  def ignore_upgrade_schema_errors():
      with ExitStack as stack:
          stack.enter_context(DbEventsFilter(type='DATABASE_ERROR', line='Failed to load schema'))
          stack.enter_context(DbEventsFilter(type='SCHEMA_FAILURE', line='Failed to load schema'))
          stack.enter_context(DbEventsFilter(type='DATABASE_ERROR', line='Failed to pull schema'))
          stack.enter_context(DbEventsFilter(type='RUNTIME_ERROR', line='Failed to load schema'))
          yield
  
  
  @contextmanager
  def ignore_no_space_errors(node):
      with DbEventsFilter(type='NO_SPACE_ERROR', node=node), \
              DbEventsFilter(type='BACKTRACE', line='No space left on device', node=node), \
              DbEventsFilter(type='DATABASE_ERROR', line='No space left on device', node=node), \
              DbEventsFilter(type='FILESYSTEM_ERROR', line='No space left on device', node=node):
          yield
  
new_contents: from contextlib import contextmanager, ExitStack
  
  from sdcm.sct_events import DbEventsFilter, Severity, DatabaseLogEvent, EventsSeverityChangerFilter, YcsbStressEvent, \
      PrometheusAlertManagerEvent
  
  
  @contextmanager
  def ignore_alternator_client_errors():
      with ExitStack() as stack:
          stack.enter_context(EventsSeverityChangerFilter(
              event_class=PrometheusAlertManagerEvent, regex=".*YCSBTooManyErrors.*", severity=Severity.WARNING,
              extra_time_to_expiration=60))
          stack.enter_context(EventsSeverityChangerFilter(
              event_class=PrometheusAlertManagerEvent, regex=".*YCSBTooManyVerifyErrors.*", severity=Severity.WARNING,
              extra_time_to_expiration=60))
          stack.enter_context(EventsSeverityChangerFilter(
              event_class=YcsbStressEvent, regex=r".*Cannot achieve consistency level.*", severity=Severity.WARNING,
              extra_time_to_expiration=30))
          stack.enter_context(EventsSeverityChangerFilter(
              event_class=YcsbStressEvent, regex=r".*Operation timed out.*", severity=Severity.WARNING,
              extra_time_to_expiration=30))
          yield
  
  
  @contextmanager
  def ignore_operation_errors():
      with ExitStack() as stack:
          stack.enter_context(EventsSeverityChangerFilter(
              event_class=DatabaseLogEvent, regex=r".*Operation timed out.*", severity=Severity.WARNING,
              extra_time_to_expiration=30))
          stack.enter_context(EventsSeverityChangerFilter(
              event_class=DatabaseLogEvent, regex=r'.*Operation failed for system.paxos.*', severity=Severity.WARNING,
              extra_time_to_expiration=30))
          yield
  
  
  @contextmanager
  def ignore_upgrade_schema_errors():
      with ExitStack() as stack:
          stack.enter_context(DbEventsFilter(type='DATABASE_ERROR', line='Failed to load schema'))
          stack.enter_context(DbEventsFilter(type='SCHEMA_FAILURE', line='Failed to load schema'))
          stack.enter_context(DbEventsFilter(type='DATABASE_ERROR', line='Failed to pull schema'))
          stack.enter_context(DbEventsFilter(type='RUNTIME_ERROR', line='Failed to load schema'))
          yield
  
  
  @contextmanager
  def ignore_no_space_errors(node):
      with DbEventsFilter(type='NO_SPACE_ERROR', node=node), \
              DbEventsFilter(type='BACKTRACE', line='No space left on device', node=node), \
              DbEventsFilter(type='DATABASE_ERROR', line='No space left on device', node=node), \
              DbEventsFilter(type='FILESYSTEM_ERROR', line='No space left on device', node=node):
          yield
  
subject: fix ExitStack usage