matplotlib
diff --git a/‎lib/matplotlib/mathtext.py
Copy file name to clipboardExpand all lines: lib/matplotlib/mathtext.py
+4-1Lines changed: 4 additions & 1 deletion b/‎lib/matplotlib/mathtext.py
Copy file name to clipboardExpand all lines: lib/matplotlib/mathtext.py
+4-1Lines changed: 4 additions & 1 deletion
@@ -999,7 +999,10 @@ def _map_virtual_font(self, fontname, font_class, uniindex):
 
         if mapping is not None:
             if isinstance(mapping, dict):
-                mapping = mapping.get(font_class, 'rm')
+                try:
+                    mapping = mapping[font_class]
+                except KeyError:
+                    mapping = mapping['rm']
 
             # Binary search for the source glyph
             lo = 0