<p>最后我修改了<strong>@Darkonaut答案(谢谢!)</strong>为了匹配我的第一种情况,我在库<code>pynput</code>中添加了一个“模拟键盘”来自动按“回车”。你知道吗</p>
<p>请注意,这在终端(python3.6.8和windows7sp1)中有效,但如果以IDLE启动则不起作用。你知道吗</p>
<pre><code>from threading import Thread, enumerate, Event
from queue import Queue, Empty
import time
from pynput.keyboard import Key, Controller
SENTINEL = None
class PromptManager(Thread):
def __init__(self, timeout):
super().__init__()
self.timeout = timeout
self._in_queue = Queue()
self._out_queue = Queue()
self.prompter = Thread(target=self._prompter, daemon=True)
self._prompter_exit = Event()
def run(self):
"""Run worker-thread. Start prompt-thread, fetch passed
input from in_queue and forward it to `._poll()` in MainThread.
If timeout occurs before user-input, enqueue SENTINEL to
unblock `.get()` in `._poll()`.
"""
self.prompter.start()
try:
txt = self._in_queue.get(timeout=self.timeout)
except Empty:
self._out_queue.put(SENTINEL)
print(f"\n[{time.ctime()}] Please press Enter to continue.")
# without usage of _prompter_exit() and Enter, the
# prompt-thread would stay alive until the whole program ends
keyboard = Controller()
keyboard.press(Key.enter)
keyboard.release(Key.enter)
self._prompter_exit.wait()
else:
self._out_queue.put(txt)
def start(self):
"""Start manager-thread."""
super().start()
return self._poll()
def _prompter(self):
"""Prompting target function for execution in prompter-thread."""
self._in_queue.put(input(f"[{time.ctime()}] >$ "))
self._prompter_exit.set()
def _poll(self):
"""Get forwarded inputs from the manager-thread executing `run()`
and process them in the parent-thread.
"""
msg = self._out_queue.get()
self.join()
return msg
def input_with_timeout(default, timeout):
print ("Hello, you can type and press enter to change 'ans' variable value or wait "+str(timeout)+" seconds and the program will continue")
pm = PromptManager(timeout)
ans= pm.start()
if isinstance(ans, str):
print("ok")
return ans
else:
return default
s="mustnotchange"
s=input_with_timeout(s,5)
if s=="mustnotchange":
print("Success, if you didn't just cheat by writing mustnotchange")
else:
print("you answered : "+s+" variable value has changed")
time.sleep(5)
</code></pre>