CODEWITHSUNDEEP
pythonpynput
davide m.
davide m.

Reputation: 462

set variable amount of hotkey listeners pynput

I would like to create a script that detects a variable amount of different hotkeys.
For example, say that I want three listeners on the hotkeys <ctrl>+1, <ctrl>+2, <ctrl>+3. I tried this: 

from pynput import keyboard


def on_macro(key):
   print('You pressed <ctrl> '+key)

if __name__ == "__main__":
   for c in range(3):
      hotkey = keyboard.HotKey(
        keyboard.HotKey.parse('<ctrl>+'+str(c)),
        lambda: on_macro(c)
      )
      listener = keyboard.Listener(on_press=hotkey.press, on_release=hotkey.release)
      listener.start()

My goal would be to have the same callback (on_macro) for every hotkey, and then inside of it determine which hotkey has been pressed and act consequently.

Upvotes: 1

Views: 543

Answers (1)

Nicholas Obert
Nicholas Obert

Reputation: 1608

I noticed that whenever I press ctrl together with another key, the output of printing the key argument of on_macro(key) is in hexadecimal, but the problem is that pynput uses no standard hexadecimal values. In this case the "ctrl + a" is translated into "\x01", "ctrl + b" into "\x02" and so on. Here is what you can do

import pynput

def on_macro(key):
    key = str(key)
    key = key.replace("'", '')
    # print(key) use this to discover which key has which value

    if key == '\\x01': # key == ctrl + a
        do_your_stuff()
    elif key == '\\x02': # key == ctrl + b
        do_other_stuff()

with pynput.keyboard.Listener(on_press=on_macro) as l:
    l.join()

to discover which key pressed with ctrl has which value, just print the key argument of your on_macro(key) function. Hope this helped you

Upvotes: 1

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