diff --git a/nifty/operators/composed_operator/composed_operator.py b/nifty/operators/composed_operator/composed_operator.py index 66d1a74493541023d274af44c55bb036f4fa6cd8..adb800032a80ecdb8082a6cc5e6d125bed88a2f2 100644 --- a/nifty/operators/composed_operator/composed_operator.py +++ b/nifty/operators/composed_operator/composed_operator.py @@ -96,6 +96,8 @@ class ComposedOperator(LinearOperator): is not easily forecasteable what the output of an operator-call will look like. """ + if spaces is None: + spaces = self.default_spaces return spaces # ---Mandatory properties and methods---