Python 使用生成器yields 的音频流在Flask 中不起作用

我正在try 使用生成器/yield 在Flask 中一个接一个地传输两个音频文件.然而，它只播放第一个文件，而不播放另一个文件.以下是我的代码:

from flask import Flask, send_file, Response
import random
import time
import wave

# Flask constructor takes the name of
# current module (__name__) as argument.
app = Flask(__name__)
 
# The route() function of the Flask class is a decorator,
# which tells the application which URL should call
# the associated function.
@app.route('/')
# ‘/’ URL is bound with paadas() function.
def paadas():
    Approach 2: not working
    def generate(files):
        for file in files:
            yield file.read()

    files = []
    number = random.randint(1,10)
    f1 = open("../numbers/" + str(number) + ".wav", 'rb')
    files.append(f1)
    times = random.randint(1,10)
    f2 = open("../times/" + str(times) + ".wav", 'rb')
    files.append(f2)
    return Response(generate(files), mimetype='audio/wav')

# main driver function
if __name__ == '__main__':
 
    # run() method of Flask class runs the application
    # on the local development server.
    app.run()

我错过了什么吗？你可以看到我在https://github.com/sameermahajan/PaadasMLFlaskApp米时try 了三种方法，只有第一种有效，但不是很优雅.如果你想试用这个程序，你可以从https://github.com/sameermahajan/Paadas得到预先录制的"Numbers"和"Times"的音频.这些都是背诵表格格式的马拉提语(一种印度语言)中的数字.