try to support operator subtraction

d304f819 · Martin Reinecke · d1901ab5 · d304f819
Commit d304f819 authored Sep 27, 2018 by Martin Reinecke
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nifty5/operators/operator.py nifty5/operators/operator.py +5 -0

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--- a/nifty5/operators/operator.py
+++ b/nifty5/operators/operator.py
@@ -57,6 +57,11 @@ class Operator(NiftyMetaBase()):
            return NotImplemented
        return _OpSum(self, x)

+    def __sub__(self, x):
+        if not isinstance(x, Operator):
+            return NotImplemented
+        return _OpSum(self, -x)
+
    def __pow__(self, power):
        if not np.isscalar(power):
            return NotImplemented