<s> class PartitionValidationError ( Exception ) : <EOL> pass <EOL> class NotPowerOf2Error ( PartitionValidationError ) : <EOL> pass <EOL> class NonContinuousShardsError ( PartitionValidationError ) : <EOL> pass <EOL> class NotZeroStartError ( PartitionValidationError ) : <EOL> pass </s>
