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When I started to study Python Essentials, I wanted to check my test results on YouTube. There were plenty of videos showing correct answers, but none of them provided any explanation. So, I had to do it myself.
I have some experience programming in Python for production, as well as in few other programming languages. But I'm not a Python expert. There are mistakes in my tests, but I always get back and explain what was the correct answer and why. Recording these videos also helped my own exam preparation.