Prevent ZeroDivisionError on plt.show() when devicePixelRatio() returns

AlexHarn · AlexHarn · commit 59380fabd012 · 2018-02-22T19:30:09.000+01:00
0.
diff --git a/lib/matplotlib/backends/backend_qt5.py b/lib/matplotlib/backends/backend_qt5.py
@@ -269,7 +269,11 @@ def _update_figure_dpi(self):
     def _dpi_ratio(self):
         # Not available on Qt4 or some older Qt5.
         try:
-            return self.devicePixelRatio()
+            ratio = self.devicePixelRatio()
+            if ratio == 0:
+                return 1
+            else:
+                return ratio
         except AttributeError:
             return 1
 
