FIX: add missing import

tacaswell · tacaswell · commit 0a911e22fde6 · 2021-08-17T11:31:32.000-04:00
diff --git a/lib/matplotlib/cm.py b/lib/matplotlib/cm.py
@@ -16,6 +16,7 @@
 """
 
 from collections.abc import Mapping, MutableMapping
+import functools
 
 import numpy as np
 from numpy import ma
