Instructor, thank you so much for providing such a high-quality lecture at such a low price! I am a new data engineer, and I was considering a thick book while thinking about how to start with big data frameworks such as Hadoop and Spark, and I came across this lecture that I had purchased in the past. I have never used Java before, so it will take some time to understand, but I will complete it well! You said you are planning a Spark lecture at the end of this year or early next year, so I am really, really looking forward to it! Please, I hope that this lecture can be explained as easily as this one based on pyspark!