I searched around and found a solution for windows at :
http://code.activestate.com/recipes/440694-determine-size-of-console-window-on-windows/
and a solution for linux here.
So here is a version which works both on linux, os x and windows/cygwin :
""" getTerminalSize()
- get width and height of console
- works on linux,os x,windows,cygwin(windows)
"""
__all__=['getTerminalSize']
def getTerminalSize():
import platform
current_os = platform.system()
tuple_xy=None
if current_os == 'Windows':
tuple_xy = _getTerminalSize_windows()
if tuple_xy is None:
tuple_xy = _getTerminalSize_tput()
# needed for window's python in cygwin's xterm!
if current_os == 'Linux' or current_os == 'Darwin' or current_os.startswith('CYGWIN'):
tuple_xy = _getTerminalSize_linux()
if tuple_xy is None:
print "default"
tuple_xy = (80, 25) # default value
return tuple_xy
def _getTerminalSize_windows():
res=None
try:
from ctypes import windll, create_string_buffer
# stdin handle is -10
# stdout handle is -11
# stderr handle is -12
h = windll.kernel32.GetStdHandle(-12)
csbi = create_string_buffer(22)
res = windll.kernel32.GetConsoleScreenBufferInfo(h, csbi)
except:
return None
if res:
import struct
(bufx, bufy, curx, cury, wattr,
left, top, right, bottom, maxx, maxy) = struct.unpack("hhhhHhhhhhh", csbi.raw)
sizex = right - left + 1
sizey = bottom - top + 1
return sizex, sizey
else:
return None
def _getTerminalSize_tput():
# get terminal width
# src: http://stackoverflow.com/questions/263890/how-do-i-find-the-width-height-of-a-terminal-window
try:
import subprocess
proc=subprocess.Popen(["tput", "cols"],stdin=subprocess.PIPE,stdout=subprocess.PIPE)
output=proc.communicate(input=None)
cols=int(output[0])
proc=subprocess.Popen(["tput", "lines"],stdin=subprocess.PIPE,stdout=subprocess.PIPE)
output=proc.communicate(input=None)
rows=int(output[0])
return (cols,rows)
except:
return None
def _getTerminalSize_linux():
def ioctl_GWINSZ(fd):
try:
import fcntl, termios, struct, os
cr = struct.unpack('hh', fcntl.ioctl(fd, termios.TIOCGWINSZ,'1234'))
except:
return None
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:
try:
cr = (env['LINES'], env['COLUMNS'])
except:
return None
return int(cr[1]), int(cr[0])
if __name__ == "__main__":
sizex,sizey=getTerminalSize()
print 'width =',sizex,'height =',sizey
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 fallback
os.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:
Code above didn't return correct result on my linux because winsize-struct has 4 unsigned shorts, not 2 signed shorts:
def terminal_size():
import fcntl, termios, struct
h, w, hp, wp = struct.unpack('HHHH',
fcntl.ioctl(0, termios.TIOCGWINSZ,
struct.pack('HHHH', 0, 0, 0, 0)))
return w, h
hp and hp should contain pixel width and height, but don't.
Starting at Python 3.3 it is straight forward: https://docs.python.org/3/library/os.html#querying-the-size-of-a-terminal
>>> import os
>>> ts = os.get_terminal_size()
>>> ts.lines
24
>>> ts.columns
80
@reannual's answer works well, but there's an issue with it: os.popen is now deprecated. The subprocess module should be used instead, so here's a version of @reannual's code that uses subprocess and directly answers the question (by giving the column width directly as an int:
import subprocess
columns = int(subprocess.check_output(['stty', 'size']).split()[1])
Tested on OS X 10.9
Many of the Python 2 implementations here will fail if there is no controlling terminal when you call this script. You can check sys.stdout.isatty() to determine if this is in fact a terminal, but that will exclude a bunch of cases, so I believe the most pythonic way to figure out the terminal size is to use the builtin curses package.
import curses
w = curses.initscr()
height, width = w.getmaxyx()
Try "blessings"
I was looking for the very same thing. It is very easy to use and offers tools for coloring, styling and positioning in the terminal. What you need is as easy as:
from blessings import Terminal
t = Terminal()
w = t.width
h = t.height
Works like a charm in Linux. (I'm not sure about MacOSX and Windows)
Download and documentation here
or you can install it with pip:
pip install blessings
It looks like there are some problems with that code, Johannes:
getTerminalSize needs to import osenv? looks like os.environ.Also, why switch lines and cols before returning? If TIOCGWINSZ and stty both say lines then cols, I say leave it that way. This confused me for a good 10 minutes before I noticed the inconsistency.
Sridhar, I didn't get that error when I piped output. I'm pretty sure it's being caught properly in the try-except.
pascal, "HHHH" doesn't work on my machine, but "hh" does. I had trouble finding documentation for that function. It looks like it's platform dependent.
chochem, incorporated.
Here's my version:
def getTerminalSize():
"""
returns (lines:int, cols:int)
"""
import os, struct
def ioctl_GWINSZ(fd):
import fcntl, termios
return struct.unpack("hh", fcntl.ioctl(fd, termios.TIOCGWINSZ, "1234"))
# try stdin, stdout, stderr
for fd in (0, 1, 2):
try:
return ioctl_GWINSZ(fd)
except:
pass
# try os.ctermid()
try:
fd = os.open(os.ctermid(), os.O_RDONLY)
try:
return ioctl_GWINSZ(fd)
finally:
os.close(fd)
except:
pass
# try `stty size`
try:
return tuple(int(x) for x in os.popen("stty size", "r").read().split())
except:
pass
# try environment variables
try:
return tuple(int(os.getenv(var)) for var in ("LINES", "COLUMNS"))
except:
pass
# i give up. return default.
return (25, 80)
Here is an version that should be Linux and Solaris compatible. Based on the posts and commments from madchine. Requires the subprocess module.
def termsize():
import shlex, subprocess, re
output = subprocess.check_output(shlex.split('/bin/stty -a'))
m = re.search('rows\D+(?P\d+); columns\D+(?P\d+);', output)
if m:
return m.group('rows'), m.group('columns')
raise OSError('Bad response: %s' % (output))
>>> termsize()
('40', '100')
If you're using Python 3.3 or above, I'd recommend the built-in get_terminal_size() as already recommended. However if you are stuck with an older version and want a simple, cross-platform way of doing this, you could use asciimatics. This package supports versions of Python back to 2.7 and uses similar options to those suggested above to get the current terminal/console size.
Simply construct your Screen class and use the dimensions property to get the height and width. This has been proven to work on Linux, OSX and Windows.
Oh - and full disclosure here: I am the author, so please feel free to open a new issue if you have any problems getting this to work.
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])
It's either:
import os
columns, rows = os.get_terminal_size(0)
# or
import shutil
columns, rows = shutil.get_terminal_size()
The shutil function is just a wrapper around os one that catches some errors and set up a fallback, however it has one huge caveat - it breaks when piping!, which is a pretty huge deal.
To get terminal size when piping use os.get_terminal_size(0) instead.
First argument 0 is an argument indicating that stdin file descriptor should be used instead of default stdout. We want to use stdin because stdout detaches itself when it is being piped which in this case raises an error.
I've tried to figure out when would it makes sense to use stdout instead of stdin argument and have no idea why it's a default here.
I was trying the solution from here that calls out to stty size:
columns = int(subprocess.check_output(['stty', 'size']).split()[1])
However this failed for me because I was working on a script that expects redirected input on stdin, and stty would complain that "stdin isn't a terminal" in that case.
I was able to make it work like this:
with open('/dev/tty') as tty:
height, width = subprocess.check_output(['stty', 'size'], stdin=tty).split()
Source: Stackoverflow.com