我正在尝试通过MPlayer播放一系列音频文件,这被归类为Python中的子进程。
然后调用.stop()命令。我希望子流程能够......停止执行。
我想要继续发生的重要事情是主线程。我不希望Python完全终止。
以下是我到目前为止尝试过的代码。
class Alarm:
urllib.request.urlretrieve(Settings.news_url, 'news.mp3')
tts1 = gTTS(text='Good morning' + Settings.name + 'It is ' + str(date.today()), lang='en')
tts2 = gTTS(text='Here is the latest news from the BBC world service', lang='en')
tts3 = gTTS(text='The weather for today is ' + Settings.weather_rss.entries[0]['title'].split(' ', 1)[1], lang='en')
tts4 = gTTS(text='That is all for now. Have a great day!', lang='en')
tts1.save(Settings.greeting)
tts2.save(Settings.news_intro)
tts3.save(Settings.weather_forecast)
tts4.save(Settings.outtro)
def play(self):
alarmpi = subprocess.call(['mplayer', Settings.greeting, Settings.news_intro, 'news.mp3', Settings.weather_forecast, Settings.outtro]);
def stop(self):
alarmpi.kill()
alarm = Alarm()
on = Thread(target=alarm.play)
stop = Thread(target=alarm.stop)
on.start()
time.sleep(5)
stop.start()
然而,当我运行这个时,我得到一个错误,说没有定义alarmpi。
有没有不同的方法来解决这个问题?
提前致谢。
答案 0 :(得分:1)
只需将alarmpi
定义为类的成员,使用self
对象存储它,以便您可以在stop
方法中调用它(首先定义它)在类构造函数中,这样您就可以在不先调用stop
的情况下调用play
def __init__(self):
self.alarmpi = None
def play(self):
self.alarmpi = subprocess.call(['mplayer', Settings.greeting, Settings.news_intro, 'news.mp3', Settings.weather_forecast, Settings.outtro]);
def stop(self):
if self.alarmpi:
self.alarmpi.kill()
self.alarmpi = None