July 2018
Intermediate to advanced
462 pages
12h 2m
English
Content preview from Qt5 Python GUI Programming Cookbook
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Updating progress bars using threads bound with a locking mechanism
This recipe will help you understand how two threads can avoid ambiguity by making use of locks. That is how shared resources can be accessed and manipulated by two threads simultaneously, without giving ambiguous results.
We will be making use of two progress bars in this recipe. One progress bar will represent progress in downloading a file, and the other progress bar will represent progress in scanning for viruses on the current drive. Only one progress bar will progress at a time.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.