'The member of the ``WD_ORIENTATION`` enumeration corresponding to the
value of the ``orient`` attribute of the ``<w:pgSz>`` child element,
or ``WD_ORIENTATION.PORTRAIT`` if not present.'

@property
def orientation(self):

    pgSz = self.pgSz
    if (pgSz is None):
        return WD_ORIENTATION.PORTRAIT
    return pgSz.orient
