class Worker (QObject): pass Code language: Python ( python ) The steps for using the QThread class are as follows:įirst, create a class that inherits from the QObject and offloads the long-running operations to this class. To communicate between the main thread and the worker threads, you use signals and slots. The secondary threads are often referred to as worker threads. To take the advantage of threading, you need to create a secondary thread to offload the long-running operations from the main thread. When you call the exec() method, it starts an event loop and creates a thread that is referred to as the main thread.Īny events that occur in the main thread run synchronously within the main event loop. While you can use these modules, PyQt provides a better way of doing it by using the QThread class and other classes. Python has a number of modules for handling threads such as threading and concurrent.futures. If you’re not familiar with the threading concept, you can learn more about it in the Python concurrency series. And to do that, you can take the advantage of threading. Therefore, when developing PyQt programs, you should know how to handle these situations. ![]() ![]() In some cases, the program is frozen completely. ![]() If a program has long-running operations, it may lag for a short moment. Summary: in this tutorial, you’ll learn how to use the PyQt QThread to create a responsive Qt application.
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