fix

nifty4/sugar.py

@@ -19,8 +19,8 @@
 import numpy as np
 from .domains.power_space import PowerSpace
 from .field import Field
-from multi.multi_field import MultiField
-from multi.multi_domain import MultiDomain
+from .multi.multi_field import MultiField
+from .multi.multi_domain import MultiDomain
 from .operators.diagonal_operator import DiagonalOperator
 from .operators.power_distributor import PowerDistributor
 from .domain_tuple import DomainTuple