Merge pull request matplotlib#6699 from anntzer/warn-on-invalid-MPLBACKEND

tacaswell · web-flow · commit c718e615e134 · 2016-07-16T10:16:59.000-05:00
MNT: raise if MPLBACKEND is not a valid backend
diff --git a/lib/matplotlib/__init__.py b/lib/matplotlib/__init__.py
@@ -1460,7 +1460,7 @@ def tk_window_focus():
     # variable MPLBACKEND
     try:
         use(os.environ['MPLBACKEND'])
-    except (KeyError, ValueError):
+    except KeyError:
         pass
 
 
