From d86bc9c9c180956d820ff9e7f4ecf74a4a5768a5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jonatan=20H=C3=B6pp?= <jonatan.hoepp@eonerc.rwth-aachen.de>
Date: Tue, 28 May 2024 14:09:09 +0200
Subject: [PATCH] added exception

---
 teaser/project.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/teaser/project.py b/teaser/project.py
index d6b227e64..b2bd0f56c 100644
--- a/teaser/project.py
+++ b/teaser/project.py
@@ -1227,6 +1227,8 @@ def process_export_vars(export_vars):
         export_vars_str = ''
         for index, (var_sel_name, var_list) in enumerate(
                 export_vars.items(), start=1):
+            if not isinstance(var_list, list):
+                raise TypeError(f"Item of key {var_sel_name} in dict 'export_vars' is not an instance of a list!")
             export_vars_str += 'MatchVariable(name="'
             processed_list = '|'.join(map(str, export_vars[var_sel_name]))
             export_vars_str += processed_list