How to change caps lock status without key press

python keyboard capslock
Anderson Santos picture Anderson Santos · Jan 31, 2010 · Viewed 9.1k times · Source

I am using a python program that is activate when pressing Caps Lock key and I want to be able to turn on/off the caps lock status when the program is active.

I tried to send keys with virtkey but it obviously don't work since the keys just activate the app and don't change the caps lock status. So what is the best way to achieve this with python?

I'm using Ubuntu

Answer

Daniel Vassallo picture Daniel Vassallo · Jan 31, 2010

On Linux:

import fcntl
import os

KDSETLED = 0x4B32

console_fd = os.open('/dev/console', os.O_NOCTTY)

# Turn on caps lock
fcntl.ioctl(console_fd, KDSETLED, 0x04)

# Turn off caps lock
fcntl.ioctl(console_fd, KDSETLED, 0)

Source: Benji York - Stack Overflow: Change keyboard locks in Python

On Windows:

You should be able to use SendKeys for this, as in the following example: 

import SendKeys

SendKeys.SendKeys("""
{CAPSLOCK}
""")

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