python实时检测键盘输入函数的示例

import sysimport ttyimport termiosdef readchar():  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 chdef readkey(getchar_fn=None):  getchar = getchar_fn or readchar  c1 = getchar()  if ord(c1) != 0x1b:    return c1  c2 = getchar()  if ord(c2) != 0x5b:    return c1  c3 = getchar()  return chr(0x10 + ord(c3) - 65)while True:  key=readkey()  if key=='w':    #go_forward()  if key=='a':    #go_back()  if key=='s':    #go_left()  if key=='d':  	#go_right()  if key=='q':  	break