pandas-dev · mroeschke · Nov 6, 2021 · Sep 24, 2021 · Sep 24, 2021 · Sep 25, 2021
diff --git a/pandas/core/indexes/base.py b/pandas/core/indexes/base.py
@@ -3484,6 +3484,9 @@ def get_loc(self, key, method=None, tolerance=None):
         indexer should be then used as an input to ndarray.take to align the
         current data to the new index.
 
+        Returns -1 for unmatched values, for further explanation see the example
+        below.
+
         Parameters
         ----------
         target : %(target_klass)s