Truthiness of a QHeaderView

[Colin Macdonald]

Sometime "recently" (maybe 6.6 or 6.7) I think the truthiness of 
QHeaderView has changed, so that `if header:` is no longer True.

Here is the __init__ method of my subclass of QTableWidget:

         header = self.horizontalHeader()
         print(header)
         if header:
             print(f"truthiness of {header} confirmed")
         else:
             print(f"{header} is not truthy!")
         if header is not None:
             print(f"{header} is not None")

The output is unexpected (to me):

<PyQt6.QtWidgets.QHeaderView object at 0x7fcc20d3ee90>
<PyQt6.QtWidgets.QHeaderView object at 0x7fcc20d3ee90> is not truthy!
<PyQt6.QtWidgets.QHeaderView object at 0x7fcc20d3ee90> is not None

I could probably try to narrow this down a bit, make a MWE etc.  But 
before I do, does this look familiar?  Are my expectations valid?  Is it 
normal to explicitly check for None rather than to assume truthiness of 
PyQt objects?

thanks,
Colin

-- 
Colin Macdonald
Associate Professor
Dept of Math, UBC