Merge pull request matplotlib#3322 from MrLeeh/patch-1

Fixed error with QSizePolicy

Author: tacaswell

lib/matplotlib/backends/backend_qt5.py

@@ -610,8 +610,8 @@ def _init_toolbar(self):
             self.locLabel.setAlignment(
                     QtCore.Qt.AlignRight | QtCore.Qt.AlignTop)
             self.locLabel.setSizePolicy(
-                QtGui.QSizePolicy(QtGui.QSizePolicy.Expanding,
-                                  QtGui.QSizePolicy.Ignored))
+                QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Expanding,
+                                  QtWidgets.QSizePolicy.Ignored))
             labelAction = self.addWidget(self.locLabel)
             labelAction.setVisible(True)