Method _create_alignable_frame

dask/dataframe/dask_expr/_collection.py:2070–2081

(self, other, join="outer")

        return new_collection(self.expr.rename_axis(mapper, index, columns, axis))

    def _create_alignable_frame(self, other, join="outer"):
        if not is_dask_collection(other) and (
            is_series_like(other) or is_dataframe_like(other)
        ):
            if join in ("inner", "left"):
                npartitions = 1
            else:
                # We have to trigger alignment, otherwise pandas will add
                # the same values to every partition
                npartitions = 2
            other = from_pandas(other, npartitions=npartitions)
        return other

    @derived_from(pd.DataFrame)
    def align(self, other, join="outer", axis=None, fill_value=None):