1. import _thread
2. import time
3. import sys
4. import os
5.  
6. class _Getch:
7.     """Gets a single character from standard input.  Does not echo to the screen."""
8.     def __init__(self):
9.         try:
10.             self.impl = _GetchWindows()
11.         except ImportError:
12.             self.impl = _GetchUnix()
13.     def __call__(self): return self.impl()
14.  
15. class _GetchUnix:
16.     def __init__(self):
17.         import sys, tty, termios
18.     def __call__(self):
19.         import sys, termios
20.         fd = sys.stdin.fileno()
21.         old_settings = termios.tcgetattr(fd)
22.         try:
23.             tty.setraw(sys.stdin.fileno())
24.             ch = sys.stdin.read(1)
25.         finally:
26.             termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
27.         return ch
28.  
29. class _GetchWindows:
30.     def __init__(self):
31.         import msvcrt
32.     def __call__(self):
33.         import msvcrt
34.         msvcrt_char = msvcrt.getch()
35.         return msvcrt_char.decode("utf-8")
36.  
37. def input_thread(done):
38.     getch = _Getch()
39.     while getch.impl() != 'q': pass
40.     done[0] = True
41.  
42. def main():
43.     done = [False]
44.     _thread.start_new_thread(input_thread, (done,))
45.     i = 0
46.     while not done[0]:
47.         i+=1
48.         #do your things here
49.         print("\r"+['\\','|','/','-'][i&3]+" press q to quit...", end="")
50.        time.sleep(.1)
51.    print()
52.  
53. main()
54.