Merge pull request #11672 from anntzer/psfontsmapcomment

timhoffm · web-flow · commit 0712fd98c6b0 · 2018-07-16T19:03:49.000+02:00
Add comment re: use of lru_cache in PsfontsMap.
diff --git a/lib/matplotlib/dviread.py b/lib/matplotlib/dviread.py
@@ -812,6 +812,9 @@ class PsfontsMap(object):
     """
     __slots__ = ('_font', '_filename')
 
+    # Create a filename -> PsfontsMap cache, so that calling
+    # `PsfontsMap(filename)` with the same filename a second time immediately
+    # returns the same object.
     @lru_cache()
     def __new__(cls, filename):
         self = object.__new__(cls)
