if format.get('height') is not None:
if format.get('width') is not None:
res = u'%sx%s' % (format['width'], format['height'])
else:
res = u'%sp' % format['height']
else:
if format.get('height') is not None:
if format.get('width') is not None:
res = u'%sx%s' % (format['width'], format['height'])
else:
res = u'%sp' % format['height']
else: