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"""
This example demonstrates how to add a custom handler to serialize
Qt's QPointF class jsonpickle using PyQt4.
"""
import sys
import unittest
from PyQt4 import QtCore
import jsonpickle
from jsonpickle import handlers
text_type = eval('unicode') if str is bytes else str
class QReduceHandler(handlers.BaseHandler):
def flatten(self, obj, data):
pickler = self.context
if not pickler.unpicklable:
return text_type(obj)
flatten = pickler.flatten
data['__reduce__'] = [flatten(i, reset=False) for i in obj.__reduce__()[1]]
return data
def restore(self, data):
unpickler = self.context
restore = unpickler.restore
reduced = [restore(i, reset=False) for i in data['__reduce__']]
modulename = reduced[0]
classname = reduced[1]
args = reduced[2]
__import__(modulename)
module = sys.modules[modulename]
factory = getattr(module, classname)
return factory(*args)
handlers.register(QtCore.QPointF, QReduceHandler)
class QtTestCase(unittest.TestCase):
def test_QPointF_roundtrip(self):
expect = QtCore.QPointF(1.0, 2.0)
json = jsonpickle.encode(expect)
actual = jsonpickle.decode(json)
self.assertEqual(expect, actual)
def suite(self):
suite = unittest.TestSuite()
suite.addSuite(unittest.makeSuite(QtTestCase))
return suite
if __name__ == '__main__':
unittest.main()
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