[QUESTION] AttributeError: '_io.BufferedReader' object has no attribute 'parse_mode' on Bot.edit_message_media

[GivenFLY]

Code example:

from time import sleep
from telegram import Bot

token = "xxxxxxx:yyyyyyyyyyyyyyy"
tgid = 0
path1 = "1.png"
path2 = "2.png"

message = Bot(token).send_photo(tgid, open(path1, "rb"))
sleep(2)
Bot(token).edit_message_media(tgid, message.message_id, media=open(path2, "rb"))

Bot should send first picture, and after 2 secconds change it to seccond
Actually bot sends first pic but while it changes to seccond an exception appears:

Traceback (most recent call last):
  File ".\issue.py", line 11, in <module>
    Bot(token).edit_message_media(tgid, message.message_id, media=open(path2, "rb"))
  File "<decorator-gen-29>", line 2, in edit_message_media
  File "C:\Users\GivenFLY\AppData\Local\Programs\Python\Python38-32\lib\site-packages\telegram\bot.py", line 67, in decorator
    result = func(*args, **kwargs)
  File "C:\Users\GivenFLY\AppData\Local\Programs\Python\Python38-32\lib\site-packages\telegram\bot.py", line 2020, in edit_message_media
    return self._message(url, data, timeout=timeout, reply_markup=reply_markup, **kwargs)
  File "C:\Users\GivenFLY\AppData\Local\Programs\Python\Python38-32\lib\site-packages\telegram\bot.py", line 169, in _message
    if data.get('media') and (data['media'].parse_mode == DEFAULT_NONE):
AttributeError: '_io.BufferedReader' object has no attribute 'parse_mode'

Configuration

Operating System: Windows 10

python-telegram-bot 12.8
certifi 2020.06.20
Python 3.8.5 (tags/v3.8.5:580fbb0, Jul 20 2020, 15:43:08) [MSC v.1926 32 bit (Intel)]

[Bibo-Joshi]

Hi. As you can see in the docs of edit_message_media, the media argument must be of type InputMedia, in your case probaby InputMediaPhoto.
BTW, instead of instatiating a new Bot instance for every method call, you can just do

bot = Bot(token)
message = bot.send_photo(…)
bot.edit_message_media

or better yet, just call message.edit_media

[GivenFLY]

But doesn't InputMediaPhoto inherit from InputMedia?
In my case I can't simply use message.edit_media. I need to change a picture using message_id

Even if I use message.edit_media it shows me same exceprion

bot = Bot(token)
message = bot.send_photo(tgid, open(path1, "rb"))
sleep(2)
message.edit_media(media=open(path2, "rb"))

Traceback:
......
AttributeError: '_io.BufferedReader' object has no attribute 'parse_mode'

[Bibo-Joshi]

But doesn't InputMediaPhoto inherit from InputMedia?

yes. that's the point ;)

In my case I can't simply use message.edit_media. I need to change a picture using message_id

As per the docs I pointed you to, message.edit_media(**kwargs) is equivalent to bot.edit_message_media(chat_id=message.chat_id, message_id=message.message_id, **kwargs)

Even if I use message.edit_media it shows me same exceprion

because you still pass an open file instead of an InputMediaPhoto instance ;)

[GivenFLY]

But how to pass an InputMedia instance?

[Bibo-Joshi]

media=InputMediaPhoto(…)

[GivenFLY]

Thank you. It helps me :)