Clever Geek Handbook

How to print in the middle of the screen?

For example,

print "hello world"

in the middle of the screen instead of the beginning? Sample output will look like this:

                                   hello world
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8 answers


Python 3 suggests shutil.get_terminal_size()

, and you can str.center

center using spaces:

import shutil

columns = shutil.get_terminal_size().columns
print("hello world".center(columns))


If you are not using Python 3 use os.get_terminal_size()

.

As @ br1ckb0t mentions, this is not convenient for Python 2. Instead of using a less convenient way, Id suggests switching to Python 3 instead.

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Similarly, you did it manually: add extra spaces.

If you want to know something about display geometry, you have to go to the library for such things. for example curses

.



The curses module provides an interface to the curses library, the de facto standard for portable processing of additional terminals.

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If this is a terminal window, do exactly what you did. If you want consistency, you can try using tab markers ( \t

) to keep things in order. Otherwise, follow Hurkyl's guidelines for using the module curses

.

>>> print "\t\t\t Hello World!"
             Hello World! # Output
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See @ minitech's answer for a good way to do this in Python 3, but in Python 2 it can be done with subprocess

(at least on OS X):

import subprocess

def print_centered(s):
    terminal_width = int(subprocess.check_output(['stty', 'size']).split()[1])
    print s.center(terminal_width)
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This way you can print leading spaces:

   print ' '*5, 'hello'
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You can use center()

to place your text in the middle.

For example:

str = "Hello World";
print str.center(20)
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I would create a helper function:

import operator

SCREEN_WIDTH = 80
centered = operator.methodcaller('center', SCREEN_WIDTH)

print(centered("hello world"))
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The version of get_termial_size that should work on python2 is tested but not extensively on ubuntu:

from collections import namedtuple

def get_terminal_size():
    import struct
    from fcntl import ioctl
    from termios import TIOCGWINSZ
    Res = namedtuple("terminal_sizes", field_names=["columns","lines"])
    try:
        term = struct.unpack('hhhh', ioctl(0, TIOCGWINSZ, '\000' * 8))
    except IOError:
        return Res(24, 80)
    return Res(term[0], term[1])



In [23]: print("Hello world".center(get_terminal_size().columns))
                              Hello world
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