How can I simulate a keystroke in python? I also want to press multiple keys simultaneously.
Something like:
keystroke('CTRL+F4')
or
keystroke('Shift+A')
-
May I ask why you want to do this? Also, under which environment? Command line? Graphical Desktop?static_rtti– static_rtti2011-04-19 09:13:10 +00:00Commented Apr 19, 2011 at 9:13
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6 Answers
Consider python-uinput and evdev. Example of shift+a with the latter:
from evdev import uinput, ecodes as e
with uinput.UInput() as ui:
ui.write(e.EV_KEY, e.KEY_LEFTSHIFT, 1)
ui.write(e.EV_KEY, e.KEY_A, 1)
ui.syn()
6 Comments
akostadinov
I tried similar code, it is exeuted because I see in system log that a new virtual input device was created but the keystrokes do not appear in X? Any special thing can be done so the keys are received by X server?
Mehdi Nellen
The links are dead
cmperezg
This is great! Note that 1 is a keydown event and 0 is keyup, so if you wanted to simulate a pressing and releasing a key more than once, you would need to place something like the following lines in a loop:
ui.write(ecodes.EV_KEY, ecodes.KEY_DOWN, 1) #key down ui.write(ecodes.EV_KEY, ecodes.KEY_DOWN, 0) #key up ui.syn()
Alex
it gave me this error:
UInputError: "/dev/uinput" cannot be opened for writing Any suggestion?
Yann Hoffmann
Adding
KERNEL=="uinput", MODE="0666 to the top of /etc/udev/rules.d/50-rogdrv.rules and reloading rules solves the problem" (github issue) You can reload udev rules like this # udevadm control --reload-rules && udevadm trigger (source) |
Pythonic API to Linux uinput kernel module...
Python-uinput is Python interface to Linux uinput kernel module which allows attaching userspace device drivers into kernel. In practice, Python-uinput makes it dead simple to create virtual joysticks, keyboards and mice for generating arbitrary input events programmatically...
answered Apr 19, 2011 at 9:12
Ignacio Vazquez-Abrams
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2 Comments
karensantana
Can i emit in lowercase? please an example!!
Mehdi Nellen
the link is dead
Although it's specific to X, you can install the xautomation package (apt-get install xautomation on Debian-based systems) and use xte to simulate keypresses, e.g.:
from subprocess import Popen, PIPE
control_f4_sequence = '''keydown Control_L
key F4
keyup Control_L
'''
shift_a_sequence = '''keydown Shift_L
key A
keyup Shift_L
'''
def keypress(sequence):
p = Popen(['xte'], stdin=PIPE)
p.communicate(input=sequence)
keypress(shift_a_sequence)
keypress(control_f4_sequence)
1 Comment
user2988257
How can I send keys to the shell?
If you plan to use it on Linux, try pyautogui library. For multiple keys you will need to use hotkey, e.g.:
pyautogui.hotkey('ctrl', 'c') # ctrl-c to copy
For me it worked - see here: How to pass a keystroke (ALT+TAB) using Popen.communicate (on Linux)?
If you are on Windows, use Sendkeys and if on Linux, try out the suggestion given here for xsendkeys or pexpect.
Comments
Simplest solution I have found was using pynput. You could do the following:
from pynput.keyboard import Key, Controller
keyboard = Controller()
with keyboard.pressed(Key.ctrl):
keyboard.press(Key.f4)
keyboard.release(Key.f4)
