python-按文件名打開類似文件的對象

Question

我想創建一個類似文件的對象，稍后將通過其文件名打開它。 有可能這樣做嗎？ 我正在尋找這樣的東西：

import io

fileLikeObject = io.BytesIO()
fileLikeObject.write((b"randomContent")
fileLikeObject.name = "someFilename.txt"

sameFileAsbefore = open("someFilename.txt", "rb")
sameFileAsbefore.read()

我已經看過了這個線程 ，但是以后無法通過文件名訪問該文件。

為了完整起見，我要專門做的是生成一個正弦波形並在Android環境中播放。 這是根據此答案改編而成的代碼。

from kivy.core.audio import SoundLoader
from kivy.base import runTouchApp
from kivy.uix.button import Button
import time


# Wave parameters
fs = 44100 # sampling frequency
duration = 2 # seconds

# Generating waveforms
timePoints = np.linspace(0, duration, duration*fs)
sineWave = np.sin(2 * np.pi * 440 * timePoints) # 440 Hz
outdata = np.transpose(np.tile(volume*outputWave, (2,1)))

class MyLabel(Button):
    def on_release(self):
        start_time = time.time()
        self.play_sound()
        print("--- %s seconds ---" % (time.time() - start_time))

    def play_sound(self):

        bytes_out = io.BytesIO()
        wavfile.write(bytes_out, fs, outdata)
        bytes_out.seek(0)

        sound = SoundLoader.load(bytes_out) # only loads by filename :/
        sound.seek(0)

        if sound:
            print("Sound found at %s" % sound.source)
            print("Sound is %.3f seconds" % sound.length)
            sound.play()

runTouchApp(MyLabel(text="Press me for a sound"))

我也歡迎其他解決方案，使我能夠在Android上播放機器生成的聲音。 感謝您的幫助！

Answer 1

俗話說，“過早的優化是萬惡之源”，對嗎？

基於@fins的注釋，我創建了臨時文件來使用tempfile庫存儲音頻。 關閉文件時，它將自動銷毀文件。

這是我在問題中發布的內容的工作版本：

from kivy.core.audio import SoundLoader
from kivy.base import runTouchApp
from kivy.uix.button import Button
from scipy.io import wavfile
import time
import tempfile
import numpy as np

# Wave parameters
fs = 44100 # sampling frequency
duration = 2 # seconds

# Generating waveforms
timePoints = np.linspace(0, duration, duration*fs)
sineWave = np.sin(2 * np.pi * 440 * timePoints) # 440 Hz
outdata = np.transpose(np.tile(sineWave, (2,1)))

class MyLabel(Button):
    def on_release(self):
        start_time = time.time()
        self.play_sound()
        print("--- %s seconds ---" % (time.time() - start_time))

    def play_sound(self):

        f = tempfile.NamedTemporaryFile(suffix = '.wav', delete=True)
        wavfile.write(f, fs, outdata)
        f.seek(0)

        sound = SoundLoader.load(f.name)

        if sound:
            print("Sound found at %s" % sound.source)
            print("Sound is %.3f seconds" % sound.length)
            sound.play()

        f.close()

runTouchApp(MyLabel(text="Press me for a sound"))