Update backend_qt5agg to fix PySide2 mem issues

simon-kraeusel · web-flow · commit 871a97a1009e · 2018-09-11T12:26:25.000+01:00
Pyside2 seems to have the same issue as PySide where the QImage data reference is incorrect and needs to be adjusted for the Python garbage collector.
diff --git a/lib/matplotlib/backends/backend_qt5agg.py b/lib/matplotlib/backends/backend_qt5agg.py
@@ -64,7 +64,7 @@ def paintEvent(self, event):
         painter.drawImage(origin / self._dpi_ratio, qimage)
         # Adjust the buf reference count to work around a memory
         # leak bug in QImage under PySide on Python 3.
-        if QT_API == 'PySide':
+        if QT_API in ('PySide', 'PySide2'):
             ctypes.c_long.from_address(id(buf)).value = 1
 
         self._draw_rect_callback(painter)
