如何设置输入的超时

Question

如果你等了4秒，上面写着“你没时间了”，这很好。但是，为了保持循环正常，您必须按下enter键才能继续。

我希望当它在下面打印“你用完了时间”时，它会显示一个输入语句，比如“输入‘攻击’继续前进”，循环就会从原来的位置继续。

from threading import Timer
import time

monsterhp = int(800)
y = 150
while monsterhp > 0:
    timeout = 4
    t = Timer(timeout, print, ['You ran out of time.'])
    t.start()
    print(" ")
    prompt = "You have %d seconds Type 'attack' to hit the monster\nType here: " % timeout
    answer = input(prompt)
    t.cancel()

    if answer == "attack":
        print("You strike the monster")
        time.sleep(1)
        monsterhp = monsterhp - y
        print("War Lord Health:", monsterhp)

Answer 1

完成你提议的任务并不像你想象的那么容易。使用signal模块可以更容易地做到这一点：(我已经将您的代码与一个修改过的答案ilinked版本结合在一起)

import signal, time

def TimedInput(prompt='', timeout=20, timeoutmsg = None):
    def timeout_error(*_):
        raise TimeoutError
    signal.signal(signal.SIGALRM, timeout_error)
    signal.alarm(timeout)
    try:
        answer = input(prompt)
        signal.alarm(0)
        return answer
    except TimeoutError:   
        if timeoutmsg:
            print(timeoutmsg)
        signal.signal(signal.SIGALRM, signal.SIG_IGN)
        return None

monsterhp = int(800)
y = 150
while monsterhp > 0:
    timeout = 4
    timeoutmsg = 'You ran out of time.'
    print(" ")
    prompt = "You have %d seconds Type 'attack' to hit the monster\nType here: " % timeout
    answer = TimedInput(prompt, timeout, timeoutmsg)

    if answer == "attack":
        print("You strike the monster")
        time.sleep(1)
        monsterhp = monsterhp - y
        print("War Lord Health:", monsterhp)

注意:这只适用于所有unix/mac系统。

您可以将while循环更改为此，以获得代码的改进版本：)

while monsterhp > 0:
        timeout = 4
        timeoutmsg = 'You ran out of time.'
        print(" ")
        prompt = "You have %d seconds Type 'attack' to hit the monster\nType here: " % timeout
        answer = TimedInput(prompt, timeout, timeoutmsg)

        if answer == "attack":
            print("You strike the monster")
            time.sleep(1)
            monsterhp = monsterhp - y
            print("War Lord Health:", monsterhp)
        elif answer == None:
            print("The War Lord has killed you, you're now dead")
            print("Thanks for playing, \nGAME OVER")
            break

Answer 2

有一个新的库inputimeout，用于标准输入和超时。

$ pip install inputimeout

用法

from inputimeout import inputimeout, TimeoutOccurred
try:
    string = inputimeout(prompt='>>', timeout=5)
except TimeoutOccurred:
    string = 'time is over'
print(string)