old_contents: from __future__ import print_function
  
  import re
  
  
  class ApiResponseUnauthorized(Exception):
  
      """ Handle errors with authenticating the API instance """
  
      def __init__(self, response):
          vals = ['status_code', 'headers', 'reason']
          [setattr(self, var, getattr(response, var))
              for var in vars(response) if var in vals]
  
      def __str__(self):
          return (
              "Mlkshk Error: {status} {reason}").format(
                  status=self.status_code,
                  reason=self.reason)
  
  class ApiInstanceUnauthorized(Exception):
      def __init__(self):
          self.reason = ("API Instance is unauthorized. You must provide "
                         "a Consumer Key, Consumer Token, Access Key, and "
                         "Access Secret. You can call get_auth() on your "
                         "API instance to get the access key and secret after "
                         "creating your application on mlkshk.com")
          super(ApiInstanceUnauthorized, self).__init__(self.reason)
  
  
  class NotFound404(Exception):
  
      """ Handle errors with 404 Not Found Status Codes """
  
      def __init__(self, response):
          vals = ['status_code', 'headers', 'reason']
          [setattr(self, var, getattr(response, var))
              for var in vars(response) if var in vals]
          self.url = response.url
  
      def __str__(self):
          return (
              "404 Not Found: ({url})").format(
                  url=self.url)
  
new_contents: from __future__ import print_function
  
  import re
  
  
  class ApiResponseUnauthorized(Exception):
  
      """ Handle errors with authenticating the API instance """
  
      def __init__(self, response):
          vals = ['status_code', 'headers', 'reason']
          [setattr(self, var, getattr(response, var))
              for var in vars(response) if var in vals]
  
      def __repr__(self):
          return (
              "Mlkshk Error: {status} {reason}").format(
                  status=self.status_code,
                  reason=self.reason)
  
  class ApiInstanceUnauthorized(Exception):
      def __init__(self):
          self.reason = ("API Instance is unauthorized. You must provide "
                         "a Consumer Key, Consumer Token, Access Key, and "
                         "Access Secret. You can call get_auth() on your "
                         "API instance to get the access key and secret after "
                         "creating your application on mlkshk.com")
          super(ApiInstanceUnauthorized, self).__init__(self.reason)
  
  
  class NotFound404(Exception):
  
      """ Handle errors with 404 Not Found Status Codes """
  
      def __init__(self, response):
          vals = ['status_code', 'headers', 'reason']
          [setattr(self, var, getattr(response, var))
              for var in vars(response) if var in vals]
          self.url = response.url
  
      def __repr__(self):
          return (
              "404 Not Found: ({url})").format(
                  url=self.url)
  
subject: standardize __str__ v __repr__