app.py

@app.route('/recording', methods=['POST'])
def alexa_task():
    file = request.files['file']
    filename = str(file.filename)
    file.save('current_data/' + file.filename)
    reply = {'msg': 'Success'}
    sox_command = 'sox -r 16000 -e unsigned -b 16 -c 1 %s %s.wav' % (
        filename, filename[:-4])
    os.system(sox_command)
    with open('current_file.text', 'w+') as f:
        f.write(str(filename[:-4]))
    return jsonify({'reply': reply}), 201