From e320623a40c30b611eaa2907884e337d360c4d19 Mon Sep 17 00:00:00 2001
From: Martin Diehl <mail@martin-diehl.net>
Date: Sun, 23 Jan 2022 14:22:36 +0100
Subject: [PATCH] simplified

dict keeps order since Python 3.6
---
 python/damask/_table.py | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/python/damask/_table.py b/python/damask/_table.py
index 418549cbb..68ed869c3 100644
--- a/python/damask/_table.py
+++ b/python/damask/_table.py
@@ -548,12 +548,8 @@ class Table:
             Filename or file for writing.
 
         """
-        data_column_items = []
-        for col in self.data.columns:
-            if col not in data_column_items:
-                data_column_items.append(col)
         labels = []
-        for l in data_column_items:
+        for l in list(dict.fromkeys(self.data.columns)):
             if self.shapes[l] == (1,):
                 labels.append(f'{l}')
             elif len(self.shapes[l]) == 1: