[PyQt] Any way to run code before each QThread?

Ned Batchelder ned at nedbatchelder.com
Mon Jul 16 01:19:03 BST 2018

On 7/15/18 12:06 PM, John Ehresman wrote:
> On 7/15/18 11:46 AM, Phil Thompson wrote:
>> Should I implement QThread.settrace()?
>> If so can somebody clarify what thread the call to sys.settrace() 
>> should be made in? The new thread or the thread from which the new 
>> thread is created?
> It would be better to use the callback function that is passed to 
> threading.settrace than to add QThread.settrace.  It's available as 
> threading._trace_hook  The sys.settrace function should be called on 
> the new thread before any Python code on that thread.
> The ugly hack that Wing's debugger uses is to wrap to run method of a 
> QThread instance that sets up the debugger for the thread and then 
> calls the original run method.
How does Wing wrap the run method?  How does it get a chance to do that?


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