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import unittest
import sys
from PySide2.QtGui import QPixmap
from PySide2.QtWidgets import QLabel, QApplication
class TestLabelPixmap(unittest.TestCase):
def testReference(self):
l = QLabel()
p = QPixmap()
l.setPixmap(p) # doesn't increment pixmap ref because this makes a copy
self.assertEqual(sys.getrefcount(p), 2)
p = l.pixmap() # this increment the reference because this is an internal pointer
self.assertEqual(sys.getrefcount(p), 3)
p2 = l.pixmap()
self.assertEqual(p, p2)
if __name__ == '__main__':
app = QApplication([])
unittest.main()
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