Python功能键的读取方法

import msvcrt
  while 1:
    if msvcrt.kbhit(): # Key pressed
      a = ord(msvcrt.getch()) # get first byte of keyscan code 
      if a == 0 or a == 224: # is it a function key
        b = ord(msvcrt.getch()) # get next byte of key scan code
        x = a + (b*256) # cook it.
        return x # return cooked scancode
      else:
        return a # else return ascii code