[PyQt] Passing python objects in QDataStream with SIP api v2

[Jugdish]

How do you pass an arbitrary python object in/out of a QDataStream when you
have the SIP API set to version 2 for QVariants?

>>> import sip
>>> sip.setapi('QVariant', 2)
>>> from PyQt4 import QtCore
>>> data = QtCore.QByteArray()
>>> outstream = QtCore.QDataStream(data, QtCore.QIODevice.WriteOnly)
>>> outstream << {'foo':'bar'}
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: unsupported operand type(s) for <<: 'QDataStream' and 'dict'
>>> outstream << QtCore.QVariant({'foo':'bar'})
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: PyQt4.QtCore.QVariant represents a mapped type and cannot be
instantiated
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