From aeed42456a174cb818b8790fffb524bae3aaf5c3 Mon Sep 17 00:00:00 2001
From: Celine Mercier <celine.mercier.bioinfo@gmail.com>
Date: Wed, 10 Jan 2024 15:52:28 +1300
Subject: [PATCH] export: columns are now in alphabetical order when exporting
 to tab format

---
 python/obitools3/format/tab.pyx | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/python/obitools3/format/tab.pyx b/python/obitools3/format/tab.pyx
index d05b4c9..7af45df 100755
--- a/python/obitools3/format/tab.pyx
+++ b/python/obitools3/format/tab.pyx
@@ -23,16 +23,17 @@ cdef class TabFormat:
     @cython.boundscheck(False)    
     def __call__(self, object data):
         
-        cdef set ktags
+        cdef object ktags
         cdef list tags = [key for key in data]
         
         line = []
-        
-        if self.tags is not None and self.tags:
-            ktags = self.tags
+        if self.tags != None and self.tags:
+            ktags = list(self.tags)
         else:
-            ktags = set(tags)            
-                
+            ktags = list(set(tags))   
+                     
+        ktags.sort()
+                        
         if self.header and self.first_line:
             for k in ktags:
                 if k in tags: