Update base.py

pandas-dev · Nov 27, 2023 · cad8aad · cad8aad
1 parent 8585bd7
commit cad8aad
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/pandas/core/internals/base.py b/pandas/core/internals/base.py
@@ -54,6 +54,11 @@
 
 class _AlreadyWarned:
     def __init__(self):
+        # This class is used on the manager level to the block level to 
+        # ensure that we warn only once. The block method can update the
+        # warned_already option without returning a value to keep the 
+        # interface consistent. This is only a temporary solution for 
+        # CoW warnings.
         self.warned_already = False