so the assertion will terminate the program and the try-exxcept won't?

Answer 1

1. Yes

2. Reasons

Assertion is
- for testing,
- for the development phase,
- for checking if interim data state are as expected.

Try-except / Try-catch is
- for releasal,
- for the production phase,
- for not harming user experience.

3. Examples

https://code.sololearn.com/cBc5B5dnk7BJ/?ref=app

https://code.sololearn.com/cK3pBr78iT2d/?ref=app

Answer 2

Assertion throws AssertionError so if assertion failed program will exit