import _thread
import time
import sys
import os

class _Getch:
    """Gets a single character from standard input.  Does not echo to the screen."""
    def __init__(self):
        try:
            self.impl = _GetchWindows()
        except ImportError:
            self.impl = _GetchUnix()
    def __call__(self): return self.impl()

class _GetchUnix:
    def __init__(self):
        import sys, tty, termios
    def __call__(self):
        import sys, termios
        fd = sys.stdin.fileno()
        old_settings = termios.tcgetattr(fd)
        try:
            tty.setraw(sys.stdin.fileno())
            ch = sys.stdin.read(1)
        finally:
            termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
        return ch

class _GetchWindows:
    def __init__(self):
        import msvcrt
    def __call__(self):
        import msvcrt
        msvcrt_char = msvcrt.getch()
        return msvcrt_char.decode("utf-8")

def input_thread(done):
    getch = _Getch()
    while getch.impl() != 'q': pass
    done[0] = True

def main():
    done = [False]
    _thread.start_new_thread(input_thread, (done,))
    i = 0
    while not done[0]:
        i+=1
        #do your things here
        print("\r"+['\\','|','/','-'][i&3]+" press q to quit...", end="")
        time.sleep(.1)
    print()

main()