[PyQt] Missing QPageSize enum in vars(QPrinter) ?

[lloyd konneker]

This code worked in PyQt4 and Qt4 to get a dictionary of paper size names:

paperSizeNames = {}
print(vars(QPrinter))
for key, value in vars(QPrinter).items():  # Python2 iteritems():
   if isinstance(value, QPrinter.PageSize):
     print(key, value)
     paperSizeNames[value] = key

It no longer works in PyQt5 and Qt5.0.1.  But other enum values appear 
to be in vars(QPrinter)?  Is missing QPageSize enum a bug of omission in 
PyQt5?

This is NOT too important, since Qt 5.1 offers 
QPrinter.supportedSizesWithNames(), which more or less does the same 
thing (returns a map from names to QSizeF, which I suppose could be 
mapped to QPageSize enum values i.e. encodings.)

Is there another way to get the names of Qt enum values?