old_contents: # Copyright (c) 2016 Uber Technologies, Inc.
  #
  # Permission is hereby granted, free of charge, to any person obtaining a copy
  # of this software and associated documentation files (the "Software"), to deal
  # in the Software without restriction, including without limitation the rights
  # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  # copies of the Software, and to permit persons to whom the Software is
  # furnished to do so, subject to the following conditions:
  #
  # The above copyright notice and this permission notice shall be included in
  # all copies or substantial portions of the Software.
  #
  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  # THE SOFTWARE.
  
  from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from __future__ import unicode_literals
  
  from uber_rides.errors import ClientError
  from uber_rides.errors import ServerError
  
  
  def error_handler(response, **kwargs):
      """Error Handler to surface 4XX and 5XX errors.
  
      Attached as a callback hook on the Request object.
  
      Parameters
          response (requests.Response)
              The HTTP response from an API request.
          **kwargs
              Arbitrary keyword arguments.
  
      Raises
          ClientError (ApiError)
              Raised if response contains a 4XX status code.
          ServerError (ApiError)
              Raised if response contains a 5XX status code.
  
      Returns
          response (requests.Response)
              The original HTTP response from the API request.
      """
      if 400 <= response.status_code <= 499:
          error_status_code = response.status_code
          error_body = response.json().get('message')
          error_message = str(error_status_code) + ': ' + error_body
          raise ClientError(response, error_message)
  
      elif 500 <= response.status_code <= 599:
          error_status_code = response.status_code
          error_body = response.json().get('message')
          error_message = str(error_status_code) + ': ' + error_body
          raise ServerError(response, error_message)
  
      return response
  
new_contents: # Copyright (c) 2016 Uber Technologies, Inc.
  #
  # Permission is hereby granted, free of charge, to any person obtaining a copy
  # of this software and associated documentation files (the "Software"), to deal
  # in the Software without restriction, including without limitation the rights
  # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  # copies of the Software, and to permit persons to whom the Software is
  # furnished to do so, subject to the following conditions:
  #
  # The above copyright notice and this permission notice shall be included in
  # all copies or substantial portions of the Software.
  #
  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  # THE SOFTWARE.
  
  from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from __future__ import unicode_literals
  
  from uber_rides.errors import ClientError
  from uber_rides.errors import ServerError
  
  from json import JSONDecodeError
  
  
  def error_handler(response, **kwargs):
      """Error Handler to surface 4XX and 5XX errors.
  
      Attached as a callback hook on the Request object.
  
      Parameters
          response (requests.Response)
              The HTTP response from an API request.
          **kwargs
              Arbitrary keyword arguments.
  
      Raises
          ClientError (ApiError)
              Raised if response contains a 4XX status code.
          ServerError (ApiError)
              Raised if response contains a 5XX status code.
  
      Returns
          response (requests.Response)
              The original HTTP response from the API request.
      """
      try:
          body = response.json()
      except JSONDecodeError:
          body = {}
      status_code = response.status_code
      message = body.get('message', '')
      fields = body.get('fields', '')
      error_message = str(status_code) + ': ' + message + ' ' + str(fields)
      if 400 <= status_code <= 499:
          raise ClientError(response, error_message)
  
      elif 500 <= status_code <= 599:
          raise ServerError(response, error_message)
  
      return response
  
subject: Remove duplicate code. Update to also append error fields generated by API to the error emssage