Python + MySQL + tkinter: how to find out if an entry exists?

Question

MySQL

I want to know if there is an entry in a MySQL table that has the value of the login parameter equal to the variable mylogin. The problem for me was that if there is no entry with the login=mylogin parameter, an exception is thrown, which for some reason cannot be caught using try-except. How to check if a required entry exists without using try-except?

Answer 1

and why select where and len result is not suitable?