kbthread.py

from threading import Thread
import signal
import sys
import os

if os.name == 'nt':
    import msvcrt

else:
    import termios
    import atexit

keys = []


def kb():
    if os.name == 'nt':
        codes = {
            b'\x48': 'up',
            b'\x50': 'down',
            b'\x4d': 'right',
            b'\x4b': 'left'
        }
    else:
        codes = {
            'A': 'up',
            'B': 'down',
            'C': 'right',
            'D': 'left'
        }
    while True:
        if os.name == 'nt':
            key = msvcrt.getch()
            keys.append(key)
            if len(keys) > 1 and keys[0] == b'\xe0':
                keys.pop(0)
                keys[0] = codes[keys[0]]
            elif len(keys) == 1 and keys[0] != b'\xe0':
                keys[0] = keys[0].decode('cp1251')
        else:
            key = sys.stdin.read(1)
            keys.append(key)
            if len(keys) == 3 and keys[0] == '\x1b':
                keys.pop(0)
                keys.pop(0)
                keys[0] = codes[keys[0]]


def set_normal_term():
    if not os.name == 'nt':
        termios.tcsetattr(fd, termios.TCSAFLUSH, old_term)

if not os.name == 'nt':
    fd = sys.stdin.fileno()
    new_term = termios.tcgetattr(fd)
    old_term = termios.tcgetattr(fd)

    # New terminal setting unbuffered
    new_term[3] = (new_term[3] & ~termios.ICANON & ~termios.ECHO)
    termios.tcsetattr(fd, termios.TCSAFLUSH, new_term)

    # Support normal-terminal reset at exit
    atexit.register(set_normal_term)


t = Thread(target=kb, daemon=True)
t.start()

if __name__ == '__main__':
    #StartKB()
    pyversion = sys.version_info.major + sys.version_info.minor /10 + sys.version_info.micro / 100
    while True:
        if keys:
            if keys == ['\033'] or keys == ['\\x1b']:
                if pyversion > 3.7 and os.name != 'nt':
                    signal.raise_signal(signal.SIGTERM)
                else: sys.exit()
                break
            print(tuple(keys))
            keys.clear()