Merge pull request matplotlib#20775 from anntzer/uq4

Author: timhoffm

lib/matplotlib/backends/backend_qt5.py

@@ -246,11 +246,7 @@ def set_cursor(self, cursor):
         self.setCursor(_api.check_getitem(cursord, cursor=cursor))
 
     def enterEvent(self, event):
-        try:
-            x, y = self.mouseEventCoords(event.pos())
-        except AttributeError:
-            # the event from PyQt4 does not include the position
-            x = y = None
+        x, y = self.mouseEventCoords(event.pos())
         FigureCanvasBase.enter_notify_event(self, guiEvent=event, xy=(x, y))
 
     def leaveEvent(self, event):

lib/matplotlib/style/core.py

@@ -37,7 +37,7 @@
 
 # A list of rcParams that should not be applied from styles
 STYLE_BLACKLIST = {
-    'interactive', 'backend', 'backend.qt4', 'webagg.port', 'webagg.address',
+    'interactive', 'backend', 'webagg.port', 'webagg.address',
     'webagg.port_retries', 'webagg.open_in_browser', 'backend_fallback',
     'toolbar', 'timezone', 'datapath', 'figure.max_open_warning',
     'figure.raise_window', 'savefig.directory', 'tk.window_focus',