code: def preamble():
      
      from . import __version__ as version
      logger.info('ANDES {ver} (Build {b}, Python {p} on {os})'
                  .format(ver=version[:5], b=version[-8:],
                          p=platform.python_version(),
                          os=platform.system()))
      try:
          username = os.getlogin() + ', '
      except OSError:
          username = ''
  
      logger.info('Session: {}{}'.format(username,
                  strftime("%m/%d/%Y %I:%M:%S %p")))
      logger.info('')
docs: Log the Andes command-line preamble at the `logging.INFO` level
  
      Returns
      -------
      None