def haystack_to_series_of_lists(haystack, index=None):
if index is None:
index = toolz.first(piece.index for piece in haystack
if hasattr(piece, 'index'))
pieces = reduce(operator.add,
(pd.Series(getattr(piece, 'values', piece),
index=index).map(ibis.util.promote_list)
for piece in haystack))
return pieces
def execute_series_join_scalar_sep(op, sep, data, **kwargs):
return reduce(lambda x, y: x + sep + y, data)