old_contents: import os
  import sys
  
  
  class ConfigHelper():
      """
          Manage all configuration information for the application
      """
      def __init__(self):
          ERROR = 1
          NEWLINE = "\n"
  
          self.halo_key = os.getenv("HALO_API_KEY")
          self.halo_secret = os.getenv("HALO_API_SECRET_KEY")
  
          # server groups used in examples
          error_string = ""
  
          server_group = os.environ["SERVER_GROUP"] = "<server_group>"
  
          server_group_temp = \
              os.environ["SERVER_GROUP_TEMP"] = "<server_group_temp>"
          server_ip = os.environ["SERVER_IP"] = "<server_ip>"
  
          # sed replaces teh defaults above once starting at line one
          # thus declaration here so no dependencies on line numbers
          SERVER_GROUP_DEFAULT = "<server_group>"
          SERVER_GROUP_TEMP_DEFAULT = "<server_group_temp>"
          SERVER_IP_DEFAULT = "<server_ip>"
  
          # check configuration
          if server_group == SERVER_GROUP_DEFAULT:
              error_string = "Environment variable SERVER_GROUP is empty"
          elif server_group_temp == SERVER_GROUP_TEMP_DEFAULT:
              error_string = "Environment variable SERVER_GROUP_TEMP is empty"
          elif server_ip == SERVER_IP_DEFAULT:
              error_string = "Environment variable SERVER_IP is empty"
  
          if server_group == SERVER_GROUP_DEFAULT or \
                  server_group_temp == SERVER_GROUP_TEMP_DEFAULT \
                  or server_ip == SERVER_IP_DEFAULT:
              print "Invalid configuration: %s... Exiting...%s" % (error_string,
                                                                   NEWLINE)
              sys.exit(ERROR)
  
new_contents: import os
  import sys
  
  
  class ConfigHelper():
      """
          Manage all configuration information for the application
      """
      def __init__(self):
          ERROR = 1
          NEWLINE = "\n"
  
          self.halo_key = os.getenv("HALO_API_KEY")
          self.halo_secret = os.getenv("HALO_API_SECRET_KEY")
  
          # server groups used in examples
          error_string = ""
  
          server_group = os.environ["SERVER_GROUP"] = "<server_group>"
  
          server_group_temp = \
              os.environ["SERVER_GROUP_TEMP"] = "<server_group_temp>"
          server_ip = os.environ["SERVER_IP"] = "<server_ip>"
          os.environ["POLICY_DIRECTORY_PATH"] = "%s/../../policy/" % os.getcwd()
          os.environ["CSM_POLICY_NAME"] = "CIS_Benchmark_forUbuntu_12.04_v1.json"
  
          # sed replaces teh defaults above once starting at line one
          # thus declaration here so no dependencies on line numbers
          SERVER_GROUP_DEFAULT = "<server_group>"
          SERVER_GROUP_TEMP_DEFAULT = "<server_group_temp>"
          SERVER_IP_DEFAULT = "<server_ip>"
  
          # check configuration
          if server_group == SERVER_GROUP_DEFAULT:
              error_string = "Environment variable SERVER_GROUP is not configured"
          elif server_group_temp == SERVER_GROUP_TEMP_DEFAULT:
              error_string = "Environment variable SERVER_GROUP_TEMP is not configured"
          elif server_ip == SERVER_IP_DEFAULT:
              error_string = "Environment variable SERVER_IP is not configured"
  
          if server_group == SERVER_GROUP_DEFAULT or \
                  server_group_temp == SERVER_GROUP_TEMP_DEFAULT \
                  or server_ip == SERVER_IP_DEFAULT:
              print "Invalid configuration: %s... Exiting...%s" % (error_string,
                                                                   NEWLINE)
              sys.exit(ERROR)
  
subject: correct error message