Merge pull request #10858 from jklymak/fix-ioerror-font-cache

tacaswell · web-flow · commit 6bcc8c77a2be · 2018-04-01T13:12:47.000-04:00
FIX: ioerror font cache, second try
diff --git a/lib/matplotlib/font_manager.py b/lib/matplotlib/font_manager.py
@@ -896,7 +896,7 @@ def json_dump(data, filename):
         try:
             json.dump(data, fh, cls=JSONEncoder, indent=2)
         except OSError as e:
-            warnings.warn('Could not save font_manager cache ', e)
+            warnings.warn('Could not save font_manager cache {}'.format(e))
 
 
 def json_load(filename):
