How to fix program language detection errors on Heroku?

Question

Python

Hello! I have a telegram bot that I want to run on heroku via git.
I did everything as in the video, but heroku writes that it cannot determine the language of the project.
How can I get rid of this error?

Procfile:
worker: python n.py

Git:


requirements.txt:
future==0.18.2
mp3-tagger==1.0
beautifulsoup4==4.9.3
moviepy==1.0.3
pyTelegramBotAPI==3.8.3
youtube_dl==2021.6.6
requests==2.26.0

heroku:

Answer 1

The *.py file must have the first line lang="python"