From d86c2ee9e5785bd618fc4f87814f79b778bd1878 Mon Sep 17 00:00:00 2001
From: Ansgar Wehrhahn <31626864+AWehrhahn@users.noreply.github.com>
Date: Tue, 31 Aug 2021 10:09:27 +0200
Subject: [PATCH] cast to str

---
 pyreduce/wavelength_calibration.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pyreduce/wavelength_calibration.py b/pyreduce/wavelength_calibration.py
index 9169778b..e0a82d53 100644
--- a/pyreduce/wavelength_calibration.py
+++ b/pyreduce/wavelength_calibration.py
@@ -120,7 +120,7 @@ def on_click(self, event):
 class LineAtlas:
     def __init__(self, element):
         self.element = element
-        fname = element.lower() + ".fits"
+        fname = str(element).lower() + ".fits"
         folder = dirname(__file__)
         self.fname = join(folder, "wavecal", "atlas", fname)
         self.wave, self.data = self.load_fits(self.fname)