On 2/7/20 9:41 AM, Israel Brewster wrote:
On Feb 6, 2020, at 11:28 AM, John Ehresman <j...@wingware.com
<mailto:j...@wingware.com>> wrote:
In general, del in Python is very different than delete in C++. I'll
leave it to others to explain.
In general, sure. In general, python memory management is very different
than C/C++ memory management, so it stands to reason that del/delete
would, in general, be different as well. I’m not asking about the
general case, I’m asking about the Qt case, and the things that Qt does
when you delete a Qt object. I’m not asking for a low-level view of
memory management. I’m asking if the *behavior*, as far as *Qt* objects
is concerned, is the same.
With PyQt or PySide, C++ delete is called when the last Python reference
is dropped to an object created from Python (there are other conditions
as well). Python del will drop a reference to the object so C++ delete
will be invoked if there are no other references to the object (and
other conditions are met). In my experience, relying on this is a
mistake because there are often other references in all but the simplest
examples.
or PySide may expose a function to do a C++ delete -- it's probably
shiboken.delete().
That sounds like what I’m looking for, assuming that a python del
doesn’t do the same thing.
If you want to be sure C++ delete is called, I recommend that you use
the function to call it.
John
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