diff --git a/nifty4/data_objects/distributed_do.py b/nifty4/data_objects/distributed_do.py index c18d438793e2783ce0b52055f69c5aa24695e3af..14d132d36ef0df546dfb09a2f9d8fbef28377ddf 100644 --- a/nifty4/data_objects/distributed_do.py +++ b/nifty4/data_objects/distributed_do.py @@ -20,6 +20,7 @@ import numpy as np from .random import Random from mpi4py import MPI import sys +from functools import reduce _comm = MPI.COMM_WORLD ntask = _comm.Get_size()