python - msvcrt getch 暂停脚本，必须继续

Question

PYTHON 3.3，msvcrt

import sys, msvcrt
print("Please press a key to see its value")
while 1:
    key = msvcrt.getch()
    print("the key is")
    print(key)
    if ord(key) == 27: # key nr 27 is escape
        sys.exit()

这是我的代码，仅作为示例。当代码到达 key = msvcrt.getch()* 或 *key = ord(getch()) 时，代码会暂停，在这里我使用了第一个。我想让这段代码不断打印关键是当我给出新输入时(当我按下某个键时)，而不是仅仅打印键。

所以打印输出看起来像这样:

the key is
the key is
the key is
the key is
the key is
the key is
77
the key is
the key is
the key is

如果您想要制作类似贪吃蛇之类的东西，您不希望每次想要获取时都暂停游戏，那么您不需要希望它暂停，等待输入。

Answer 1

使用msvcrt.kbhit检查是否按下了键:

import sys, msvcrt
import time

print("Please press a key to see its value")
while 1:
    print("the key is")
    if msvcrt.kbhit(): # <--------
        key = msvcrt.getch()
        print(key)
        if ord(key) == 27:
            sys.exit()
    time.sleep(0.1)