Added header with license

pandas/data_frame_concat_by_columns.py

@@ -1,6 +1,18 @@
 #!/usr/bin/env python3
 # vim: set fileencoding=utf-8
 
+#
+#  (C) Copyright 2021  Pavel Tisnovsky
+#
+#  All rights reserved. This program and the accompanying materials
+#  are made available under the terms of the Eclipse Public License v1.0
+#  which accompanies this distribution, and is available at
+#  http://www.eclipse.org/legal/epl-v10.html
+#
+#  Contributors:
+#      Pavel Tisnovsky
+#
+
 import pandas
 
 # přečtení zdrojových dat