code: def validate_options(subscription_key, text):
      
      if not subscription_key or len(subscription_key) == 0:
          print 'Error: Warning the option subscription_key should contain a string.'
          print USAGE
          sys.exit(3)
      if not text or len(text) == 0:
          print 'Error: Warning the option text should contain a string.'
          print USAGE
          sys.exit(3)
docs: Perform sanity checks on threshold values