From bae4b2e14e7e4bb264f4e52b49a884a136a0c8a3 Mon Sep 17 00:00:00 2001
From: Dieter Weber <d.weber@fz-juelich.de>
Date: Tue, 22 Oct 2024 17:47:59 +0200
Subject: [PATCH] Make sure it works without support in LiberTEM

---
 src/libertem_live/udf/monitor.py | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/libertem_live/udf/monitor.py b/src/libertem_live/udf/monitor.py
index 89b7256b..86ec3f26 100644
--- a/src/libertem_live/udf/monitor.py
+++ b/src/libertem_live/udf/monitor.py
@@ -17,13 +17,15 @@ class SignalMonitorUDF(UDF):
 
     def get_backends(self):
         ''
+        # feature detection until we depend on a version with
+        # https://github.com/LiberTEM/LiberTEM/pull/1684
+        scipy_coo_array = getattr(self, 'BACKEND_SCIPY_COO_ARRAY', None)
         return [
             backend for backend in self.BACKEND_ALL
             if backend not in {
                 self.BACKEND_CUPY_SCIPY_COO,
                 self.BACKEND_SCIPY_COO,
-                self.BACKEND_SCIPY_COO_ARRAY
-            }
+            }.union((scipy_coo_array, ) if scipy_coo_array is not None else tuple())
         ]
 
     # def get_preferred_input_dtype(self):