Question

在提示raw_input后，我无法弄清楚如何在while循环的第二次迭代中避免EOFError。我需要这个循环运行30次，理想情况下不会有一个try-except块，它会从程序启动我。任何帮助将不胜感激！`

import sys
import pyaudio
import wave
import os
import fcntl
import time

def main():
    sound_cues = open('sound_cues').read().splitlines()
    light_cues = open('light_cues').read().splitlines()
    play_names = open('play_names').read().splitlines()
    plays = []

    for idx in range(len(play_names)):
        plays.append( {'name': play_names[idx], 'sound': sound_cues[idx], 'lights': light_cues[idx]} )

    while(True):
        play_num = raw_input("Enter a play number: ")

        play = plays[int(play_num) - 1]
        print
        print 'lights:'
        print play['lights']
        print
        raw_input("Press Enter to start sound...")
        print
        print 'sound:'
        print play['sound']

        audio = "sounds/" + play['sound']

        wf = wave.open(audio)
        p = pyaudio.PyAudio()
        stream = p.open(format=p.get_format_from_width(wf.getsampwidth()),
                channels = wf.getnchannels(),
                rate = wf.getframerate(),
                output=True)

        data = wf.readframes(1024)
        fl = fcntl.fcntl(sys.stdin.fileno(), fcntl.F_GETFL)
        fcntl.fcntl(sys.stdin.fileno(), fcntl.F_SETFL, fl | os.O_NONBLOCK)
        print
        print "Press Enter to stop audio..."
        print
        while data != '':
            try:
                stdin = sys.stdin.read()
                if "\n" in stdin or "\r" in stdin:
                    break
            except IOError:
                pass
            stream.write(data)
            data = wf.readframes(1024)

if __name__ == "__main__":
    main()

`

输出为“

Enter a play number: 2

lights:
Black out, clamp light works as spot, follows Kris

Press Enter to start sound...

sound:
1.wav

Press Enter to stop audio...


Enter a play number: Traceback (most recent call last):
  File "30plays_1.py", line 56, in <module>
    main()
  File "30plays_1.py", line 18, in main
    play_num = raw_input("Enter a play number: ")
EOFError

`

Answer 1

您是否尝试过构建一个重现错误的最小工作示例？我在Windows上运行python，所以我无法尝试你正在做的一切，因为fcntl是unix特定的，但我建议你开始删除部分代码（比如阅读和播放文件），直到错误消失。

此外，您正在打开文件和流，但从未明确地关闭它们，例如你打电话给stream = p.open(...)，但没有stream.stop_stream()和 stream.close()，以及wf.close()。这可能与您的错误无关，但最好是关闭文件而不是依赖垃圾回收。

使用raw_input时while循环中的Python EOFError

1 个答案: