diff --git a/pandas/core/reshape/concat.py b/pandas/core/reshape/concat.py index d17e5b475ae57..de6c5416e08c9 100644 --- a/pandas/core/reshape/concat.py +++ b/pandas/core/reshape/concat.py @@ -171,7 +171,7 @@ def concat( Parameters ---------- objs : an iterable or mapping of Series or DataFrame objects - If a mapping is passed, the sorted keys will be used as the `keys` + If a mapping is passed, the keys will be used as the `keys` argument, unless it is passed, in which case the values will be selected (see below). Any None objects will be dropped silently unless they are all None in which case a ValueError will be raised.