"At <a href=""https://www.youtube.com/watch?v=KN2TTiGpDvM&amp;t=2m40s"">2:40</a> in the use case in the inner while loop isn't that supposed to be  in the parentheses..<br>I believe it should be as below",correct me if I am wrong.<br>    while (chunk := f.read(8192)):