code: def main_inject(args):
      
      ret = 0
  
      try:
          filepath = SiteCustomizeFile()
          if filepath.is_injected():
              logger.info("Pout has already been injected into {}".format(filepath))
  
          else:
              if filepath.inject():
                  logger.info("Injected pout into {}".format(filepath))
              else:
                  logger.info("Failed to inject pout into {}".format(filepath))
  
      except IOError as e:
          ret = 1
          logger.info(str(e))
  
      return ret
docs: mapped to pout.inject on the command line, makes it easy to make pout global
      without having to actually import it in your python environment
  
      .. since:: 2018-08-13
  
      :param args: Namespace, the parsed CLI arguments passed into the application
      :returns: int, the return code of the CLI