PyQt graphical user interface (GUI) applications have a main thread of execution that runs the event loop and GUI. If you launch a long-running task in this thread, then your GUI will freeze until the task terminates. During that time, the user won’t be able to interact with the application, resulting in a bad user experience. Luckily, PyQt’s QThread class allows you to work around this issue.

In this tutorial, you’ll learn how to:

  • Use PyQt’s QThread to prevent freezing GUIs
  • Create reusable threads with QThreadPool and QRunnable
  • Manage interthread communication using signals and slots
  • Safely use shared resources with PyQt’s locks
  • Use best practices for developing GUI applications with PyQt’s thread support

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Use PyQt's QThread to Prevent Freezing GUIs
19.70 GEEK