Method case_when

dask/dataframe/dask_expr/_collection.py:4602–4606

(self, caselist)

        @derived_from(pd.Series)
        def case_when(self, caselist):
            if not isinstance(caselist, list):
                raise TypeError("The caselist argument should be a list")
            caselist = list(flatten([[c, v] for c, v in caselist], container=list))
            return new_collection(expr.CaseWhen(self, *caselist))


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