old_contents: import six
  
  
  class APIError(Exception):
      "SmartFile API base Exception."
      pass
  
  
  class RequestError(APIError):
      """ Exception for issues regarding a request. """
      def __init__(self, exc, *args, **kwargs):
          self.exc = exc
          self.detail = str(exc)
          super(RequestError, self).__init__(*args, **kwargs)
  
      def __str__(self):
          return self.detail
  
  
  class ResponseError(APIError):
      """ Exception for issues regarding a response. """
      def __init__(self, response, *args, **kwargs):
          self.response = response
          self.status_code = response.status_code
          try:
              json = response.json()
          except ValueError:
              if self.status_code == 404:
                  self.detail = six.u('Invalid URL, check your API path')
              else:
                  self.detail = six.u('Server error; check response for errors')
          else:
              if self.status_code == 400 and 'field_errors' in json:
                  self.detail = json['field_errors']
              else:
                  try:
                      # A faulty move request returns the below response
                      self.detail = json['src'][0]
                  except KeyError:
                      # A faulty delete request returns the below response
                      self.detail = json['path'][0]
          super(ResponseError, self).__init__(*args, **kwargs)
  
      def __str__(self):
          return 'Response {0}: {1}'.format(self.status_code, self.detail)
  
new_contents: import six
  
  
  class APIError(Exception):
      "SmartFile API base Exception."
      pass
  
  
  class RequestError(APIError):
      """ Exception for issues regarding a request. """
      def __init__(self, exc, *args, **kwargs):
          self.exc = exc
          self.detail = str(exc)
          super(RequestError, self).__init__(*args, **kwargs)
  
      def __str__(self):
          return self.detail
  
  
  class ResponseError(APIError):
      """ Exception for issues regarding a response. """
      def __init__(self, response, *args, **kwargs):
          self.response = response
          self.status_code = response.status_code
          try:
              json = response.json()
          except ValueError:
              if self.status_code == 404:
                  self.detail = six.u('Invalid URL, check your API path')
              else:
                  self.detail = six.u('Server error; check response for error')
          else:
              if self.status_code == 400 and 'field_errors' in json:
                  self.detail = json['field_errors']
              else:
                  try:
                      # A faulty move request returns the below response
                      self.detail = json['src'][0]
                  except KeyError:
                      # A faulty delete request returns the below response
                      self.detail = json['path'][0]
          super(ResponseError, self).__init__(*args, **kwargs)
  
      def __str__(self):
          return 'Response {0}: {1}'.format(self.status_code, self.detail)
  
subject: remove debug code