From db16d3771904b9abda3835d532f1b01cf0d60d78 Mon Sep 17 00:00:00 2001
From: "benjamin.jakimow@geo.hu-berlin.de" <q8DTkxUg-BB>
Date: Wed, 26 Jul 2017 17:15:19 +0200
Subject: [PATCH] SensorInstrument now handles missing wlu

---
 timeseriesviewer/timeseries.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/timeseriesviewer/timeseries.py b/timeseriesviewer/timeseries.py
index 053933df..f9ca7454 100644
--- a/timeseriesviewer/timeseries.py
+++ b/timeseriesviewer/timeseries.py
@@ -105,8 +105,10 @@ class SensorInstrument(QObject):
             self.wavelengths = np.asarray(wl)
             self.wavelengthUnits = wlu
         self._id = '{}b{}m'.format(self.nb, self.px_size_x)
+        if wlu is None:
+            wlu = ''
         if wl is not None:
-            self._id += ';'.join([str(w) for w in self.wavelengths])+ wlu
+            self._id += ';'.join([str(w) for w in self.wavelengths])+wlu
         if sensor_name is None:
 
             sensor_name = '{}bands@{}m'.format(self.nb, self.px_size_x)
-- 
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