diff --git a/cfg_checker/common/other.py b/cfg_checker/common/other.py
index 35495b3..a385b90 100644
--- a/cfg_checker/common/other.py
+++ b/cfg_checker/common/other.py
@@ -99,7 +99,10 @@
     def get_node_code(self, fqdn):
         # validate
         _isvalid, _message = self.validate_name(fqdn, message=True)
-        _code = re.findall(r"[a-zA-Z]+?(?=(?:[0-9]+$)|(?:\-+?)|(?:\_+?)|$)", fqdn.split('.')[0])
+        _code = re.findall(
+            r"[a-zA-Z]+?(?=(?:[0-9]+$)|(?:\-+?)|(?:\_+?)|$)",
+            fqdn.split('.')[0]
+        )
         # check if it is valid and raise if not
         if _isvalid:
             # try to match it with ones in map