How to get Linux console window width in Python
Not sure why it is in the module shutil
, but it landed there in Python 3.3, Querying the size of the output terminal:
>>> import shutil>>> shutil.get_terminal_size((80, 20)) # pass fallbackos.terminal_size(columns=87, lines=23) # returns a named-tuple
A low-level implementation is in the os module. Also works in Windows.
A backport is now available for Python 3.2 and below:
import osrows, columns = os.popen('stty size', 'r').read().split()
uses the 'stty size' command which according to a thread on the python mailing list is reasonably universal on linux. It opens the 'stty size' command as a file, 'reads' from it, and uses a simple string split to separate the coordinates.
Unlike the os.environ["COLUMNS"] value (which I can't access in spite of using bash as my standard shell) the data will also be up-to-date whereas I believe the os.environ["COLUMNS"] value would only be valid for the time of the launch of the python interpreter (suppose the user resized the window since then).
(See answer by @GringoSuave on how to do this on python 3.3+)
use
import console(width, height) = console.getTerminalSize()print "Your terminal's width is: %d" % width
EDIT: oh, I'm sorry. That's not a python standard lib one, here's the source of console.py (I don't know where it's from).
The module seems to work like that: It checks if termcap
is available, when yes. It uses that; if no it checks whether the terminal supports a special ioctl
call and that does not work, too, it checks for the environment variables some shells export for that.This will probably work on UNIX only.
def getTerminalSize(): import os env = os.environ def ioctl_GWINSZ(fd): try: import fcntl, termios, struct, os cr = struct.unpack('hh', fcntl.ioctl(fd, termios.TIOCGWINSZ, '1234')) except: return return cr cr = ioctl_GWINSZ(0) or ioctl_GWINSZ(1) or ioctl_GWINSZ(2) if not cr: try: fd = os.open(os.ctermid(), os.O_RDONLY) cr = ioctl_GWINSZ(fd) os.close(fd) except: pass if not cr: cr = (env.get('LINES', 25), env.get('COLUMNS', 80)) ### Use get(key[, default]) instead of a try/catch #try: # cr = (env['LINES'], env['COLUMNS']) #except: # cr = (25, 80) return int(cr[1]), int(cr[0])