Python key binding/capture

Question

I'd like to know the simplest way to bind keys in python

for example, the default python console window apears and waits, then in psuedo ->

if key "Y" is pressed:
   print ("Yes")
if key "N" is pressed:
   print ("No")

I would like to achieve this without the use of any modules not included by python. just pure python

Any and all help is greatly appreciated

python 2.7 or 3.x Windows 7

Note: raw_input() requires the user to hit enter and is therefore not keybinding

This might help http://stackoverflow.com/questions/510357/python-read-a-single-character-from-the-user — Ansuman Bebarta, Jul 23 '13 at 10:45

score 6 · Accepted Answer · answered Jul 23 '13 at 10:46

6

From http://code.activestate.com/recipes/134892/ (although a bit simplified):

class _Getch:
    """Gets a single character from standard input.  Does not echo to the
screen."""
    def __init__(self):
        self.impl = _GetchUnix()
    def __call__(self): 
        return self.impl()


class _GetchUnix:
    def __init__(self):
        import tty, sys
    def __call__(self):
        import sys, tty, termios
        fd = sys.stdin.fileno()
        old_settings = termios.tcgetattr(fd)
        try:
            tty.setraw(sys.stdin.fileno())
            ch = sys.stdin.read(1)
        finally:
            termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
        return ch

getch = _Getch()

Then you can do:

>>> getch()
'Y' # Here I typed Y

This is great as it doesn't need any 3rd party modules.

answered Jul 23 '13 at 10:46

TerryA

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which version of python is this intended for? – DCA- Jul 23 '13 at 10:51
Thanks! this will help alot :D – DCA- Jul 23 '13 at 10:57
The link(`code.activestate`) seems dead says bad request. Also should I do: `print(getch.__call__()) `@TerryA – alper Jun 16 '20 at 14:21
1

@alper Link still seems to work for me,and no you justneed to do `getch()` – TerryA Jun 18 '20 at 03:33
Thanks, link seems working but when I tried few more times I keep getting: `Bad Request Your browser sent a request that this server could not understand. Apache Server at aardvark.activestate.com Port 80` error. – alper Jun 18 '20 at 08:33

score 3 · Answer 2 · edited Jan 12 '17 at 20:12

3

Well, the way to do it with Tkinter which is a module included in the python install is here:

from tkinter import *

window = Tk()
window.geometry("600x400")
window.title("Test")

def test(event):
    print("Hi")

window.bind("a", test)

window.mainloop()

edited Jan 12 '17 at 20:12

Uyghur Lives Matter

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answered Jan 12 '17 at 18:25

ShinyMemesYT

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score 0 · Answer 3 · edited May 30 '18 at 18:31

0

If you have a screen, you might like this:

screen = turtle.Screen()
def blabla:
    # your code here
screen.listen()
screen.onkey(blabla, "(any key here)")

edited May 30 '18 at 18:31

divibisan

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answered May 30 '18 at 18:20

Max

1

Thanks for your post. Since this is an old question, it would help if you explained why someone might prefer your answer to one of the other existing answers. – divibisan May 30 '18 at 18:31
@divibisan, I don't know of a requirement that a question be new to add an answer to it, or that it has to be "better" than an existing answer for some reason. I appreciate alternate approaches in SO. However, I wish this answer worked out of the box. I've never seen turtle before and it'd be cool if the code above was an MWE. – user1717828 Nov 20 '20 at 11:59

Python key binding/capture

3 Answers3

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