Thread error in Python & PyQt?

It is indeed a fact of life that multithreaded use of Qt (and other rich frameworks) is a delicate and difficult job, requiring explicit attention and care -- see Qt's docs for an excellent coverage of the subject (for readers experienced in threading in general, with suggested readings for those who yet aren't).

It is indeed a fact of life that multithreaded use of Qt (and other rich frameworks) is a delicate and difficult job, requiring explicit attention and care -- see Qt's docs for an excellent coverage of the subject (for readers experienced in threading in general, with suggested readings for those who yet aren't). If you possibly can, I would suggest what I always suggest as the soundest architecture for threading in Python: let each subsystem be owned and used by a single dedicated thread; communicate among threads via instances of Queue. Queue, i.e.

, by message passing. This approach can be a bit restrictive, but it provides a good foundation on which specifically identified and carefully architected exceptions (based on thread pools, occasional new threads being spawned, locks, condition variables, and other such finicky things;-). In the latter category I would also classify Qt-specific things such as cross-thread signal/slot communication via queued connections.

Looks like you've stumped on a Qt limitation there. Try using signals or events if you need objects to communicate across threads. Or ask the Qt folk about this.It doesn't seem specific to PyQt.

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