From d304f819bdb9dbd61575a5dcad0d83d877ecfa01 Mon Sep 17 00:00:00 2001
From: Martin Reinecke <martin@mpa-garching.mpg.de>
Date: Thu, 27 Sep 2018 15:07:59 +0200
Subject: [PATCH] try to support operator subtraction
---
nifty5/operators/operator.py | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/nifty5/operators/operator.py b/nifty5/operators/operator.py
index dbc8cd387..efcd926d5 100644
--- 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
--
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