content: import sys, os
  
  global_settings = {}
  
  if __name__ == "__main__":
  
      for e in ['XXH_HOME', 'PIP_TARGET', 'PYTHONPATH']:
          if e in os.environ:
              global_settings[e] = os.environ[e]
  
      if len(sys.argv) > 1:
          setting_name = sys.argv[1]
          if setting_name in global_settings:
              print(global_settings[setting_name])
          else:
              sys.exit(1)
      else:
          print(global_settings)
  