An Intro to Context Managers
Context managers are a handy way to open and close files, dialogs, thread locks and so much more!
Check out this short tutorial that introduces you to the concepts of context managers by Mike Driscoll
Want to learn more Python? Check out Mike's blog: https://www.blog.pythonlibrary.org/
Purchase the Python 101 book - https://amzn.to/2Zo1ARG
Learn about image processing with Python: https://gum.co/pypillow