old_contents: from __future__ import unicode_literals
  from moto.core.exceptions import JsonRESTError
  
  
  class SecretsManagerClientError(JsonRESTError):
      code = 400
  
  
  class ResourceNotFoundException(SecretsManagerClientError):
      def __init__(self):
          self.code = 404
          super(ResourceNotFoundException, self).__init__(
              "ResourceNotFoundException",
              "Secrets Manager can't find the specified secret"
          )
  
  
  class ClientError(SecretsManagerClientError):
      def __init__(self, message):
          super(ClientError, self).__init__(
              'InvalidParameterValue',
              message)
  
  
  class InvalidParameterException(SecretsManagerClientError):
      def __init__(self, message):
          super(InvalidParameterException, self).__init__(
              'InvalidParameterException',
              message)
  
  
  class InvalidRequestException(SecretsManagerClientError):
      def __init__(self, message):
          super(InvalidRequestException, self).__init__(
              'InvalidRequestException',
              message)
new_contents: from __future__ import unicode_literals
  from moto.core.exceptions import JsonRESTError
  
  
  class SecretsManagerClientError(JsonRESTError):
      code = 400
  
  
  class ResourceNotFoundException(SecretsManagerClientError):
      def __init__(self):
          self.code = 404
          super(ResourceNotFoundException, self).__init__(
              "ResourceNotFoundException",
              "Secrets Manager can't find the specified secret"
          )
  
  
  class ClientError(SecretsManagerClientError):
      def __init__(self, message):
          super(ClientError, self).__init__(
              'InvalidParameterValue',
              message)
  
  
  class InvalidParameterException(SecretsManagerClientError):
      def __init__(self, message):
          super(InvalidParameterException, self).__init__(
              'InvalidParameterException',
              message)
  
  
  class InvalidRequestException(SecretsManagerClientError):
      def __init__(self, message):
          super(InvalidRequestException, self).__init__(
              'InvalidRequestException',
              message)
  
subject: Fix flake8