serenajiang commented on a change in pull request #15975:
URL: https://github.com/apache/superset/pull/15975#discussion_r680088605
##########
File path: superset/utils/pandas_postprocessing.py
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@@ -264,6 +264,17 @@ def pivot( # pylint: disable=too-many-arguments
# Remove once/if support is added.
aggfunc = {na.column: na.aggfunc for na in aggregate_funcs.values()}
+ # When dropna = False, the pivot_table function will calculate
cartesian-product
+ # for MultiIndex.
+ # https://github.com/apache/superset/issues/15956
+ # https://github.com/pandas-dev/pandas/issues/18030
+ series_set = set()
+ lst_to_str: Callable[[List[Any]], str] = lambda lst: "_".join(str(_) for _
in lst)
Review comment:
minor nit - I think you could just replace calls of this this with
`str()`.
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