From 5f2848d5845ca0c32e5517a7f937749e8e2dfeab Mon Sep 17 00:00:00 2001
From: Marcel <marcel.paffrath@rub.de>
Date: Fri, 3 Aug 2018 14:03:27 +0200
Subject: [PATCH] [bugfix] do not read the same files multiple times for each
 channel

---
 pylot/core/io/data.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pylot/core/io/data.py b/pylot/core/io/data.py
index 3802bfd3..f1f3443d 100644
--- a/pylot/core/io/data.py
+++ b/pylot/core/io/data.py
@@ -434,7 +434,7 @@ class Data(object):
                             False: self.wfdata}
 
         warnmsg = ''
-        for fname in fnames:
+        for fname in set(fnames):
             try:
                 real_or_syn_data[synthetic] += read(fname)
             except TypeError: