1988 

  1989 def termwidth():

  1990     if 'COLUMNS' in os.environ:

  1991         try:

  1992             return int(os.environ['COLUMNS'])

  1993         except ValueError:

  1994             pass

  1995     try:

  1996         import termios, array, fcntl

  1997         for dev in (sys.stdout, sys.stdin):

  1998             try:

  1999                 fd = dev.fileno()

  2000                 if not os.isatty(fd):

  2001                     continue

  2002                 arri = fcntl.ioctl(fd, termios.TIOCGWINSZ, '\0' * 8)

  2003                 return array.array('h', arri)[1]

  2004             except ValueError:

  2005                 pass

  2006     except ImportError:

  2007         pass

  2008     return 80