How to save an image in BytesIO?

Question

Python

there is a code snippet from Telegram Bot

def decrypting(message):
        detector = cv2.QRCodeDetector()
        qr_image = message.photo
        bio = BytesIO()
        qr_image.save(bio, 'JPEG')
        bio.seek(0)
        data = detector.detectAndDecode(bio)
        bot.send_message(message.chat.id, f'QR code data: \n\n{data}')

an error occurs while running the function

Answer 1

The photo attribute of the Message class is a list. Read the documentation.