document what basic units is

story645 · story645 · commit 8968af5c4d31 · 2025-04-10T14:43:53.000-04:00
diff --git a/galleries/examples/units/basic_units.py b/galleries/examples/units/basic_units.py
@@ -5,6 +5,14 @@
 Basic units
 ===========
 
+
+This file implements a units library that supports registering arbitrary units,
+conversions between units, and math with unitized data. This library is used in the
+examples to demonstrate unit conversion functionality.
+
+It is only maintained for the purposes of building documentation and should never be
+used outside of the matplotlib documentation.
+
 """
 
 import itertools
