Can you help with python bot?

Question

Python

I'm a beginner, I made my first bot, monitoring the coronavirus, it works well, but when you click let's say "countries", This is Russia, Ukraine, etc., it always crashes, although it sends the correct answer. Here is the code: https://hastebin.com/elihakodiq.py And when I click "all countries", the program does not crash. What is the problem? At the end, I wrote bot.polling(none_stop=True, timeout=60), but it did not help , I
used modules requests==2.23.0
covid==2.1.3
pyTelegramBotAPI==3.6.7
translate==3.5.0

Answer 1

Because print uses message.from_user.last_name which is not always present (i.e. may be None).