especificos-node/client/keyboard.py

import threading
import json
from select import select
from evdev import ecodes, InputDevice, list_devices


class Keyboard(threading.Thread):
    def __init__(self,sock):
        super(Keyboard, self).__init__()
        self.devices = [InputDevice(d) for d in list_devices("/dev/input/")]
        self.sock = sock
        self.running = False

    def run(self):
        self.running=True
        self.handleInput()
    def handleInput(self):
        dev = InputDevice("/dev/input/by-id/usb-Microsoft_Comfort_Curve_Keyboard_3000-event-kbd")
        VALID_KEYS = [ "KEY_PAGEUP", "KEY_PAGEDOWN", "KEY_F5" ]
        while True:
            r, w, e = select([dev], [], [])
            for ev in dev.read():
                codename = '?'
                if ev.type == ecodes.EV_SYN:
                   continue 
                if ev.type in ecodes.bytype:
                    codename = ecodes.bytype[ev.type][ev.code]
                if codename in VALID_KEYS and ev.value==0:
                    print(codename)