From d2dfab27a17158036b8223eb18444658693ac0e0 Mon Sep 17 00:00:00 2001
From: zineb aly <aly.zineb.az@gmail.com>
Date: Thu, 23 Jan 2020 21:50:10 +0100
Subject: [PATCH] read Head and warn for Header

---
 km3io/offline.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/km3io/offline.py b/km3io/offline.py
index b2bc9ed..44d834e 100644
--- a/km3io/offline.py
+++ b/km3io/offline.py
@@ -1,4 +1,5 @@
 import uproot
+import warnings
 
 # 110 MB based on the size of the largest basket found so far in km3net
 BASKET_CACHE_SIZE = 110 * 1024**2
@@ -336,7 +337,7 @@ class OfflineReader:
                     print("{:15s} {}".format(n.decode("utf-8"), x))
                     self._header = fobj['Head']._map_3c_string_2c_string_3e_
             if b'Header;1' in fobj.keys():
-                print('not yet accessible')
+                warnings.warn("Your file header has an unsupported format")
         return self._header
 
 
-- 
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