Improvement to give tkinter file dialog focus

[OshinoMoumou]

Greetings! I noticed that your code referred a StackOverflow post, while a recent comment to it advised using root.attributes('-alpha', 0.3) to make the window invisible. I'm trying to learn the usefulness of such small updates on StackOverflow. Would this comment help improve your code? I understand that such improvement might not be helpful in real life situation. In that case, do you think this comment can help prevent future bugs (for example, when the code were reused somewhere else)? I'll really appreciate it if you could kindly give me some feedback or suggestions. Thank you very much for your time. Have a nice day!