Hello, I ran into a problem, I want to write a weather forecast for a telebot on my code does not work?

Question

Bots

how to make the program check on the telebot whether the user wrote his city correctly, if he enters his city incorrectly, the user receives a notification
how to do this

Answer 1

I want to write a weather forecast

how to do it

program.
That's honest. If you want to write, write. If you want to write for you - pay. Where are your attempts to write something, algorithms, at least fabrications how to solve this problem?

Answer 2

Start with a problematic, describe the specific problem you want to solve.
If the question is how to validate the city that the user wrote, then look towards the FIAS, try the API of the Dadata service . As an option - display a list of buttons with cities that are similar to what the user wrote.