From 75d5b7bf81f8091cc36d70e51dc4a4eb0c02312f Mon Sep 17 00:00:00 2001
From: Stephen Copplestone <stephen@copplestone.de>
Date: Wed, 25 Mar 2026 20:49:27 +0100
Subject: [PATCH] Fix error "UnboundLocalError: cannot access local variable
 '_' where it is not associated with a value" when trying to use "variable =
 [_] ..."

---
 pyhope/mesh/fem/fem.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pyhope/mesh/fem/fem.py b/pyhope/mesh/fem/fem.py
index 17345a6b..cf83235a 100644
--- a/pyhope/mesh/fem/fem.py
+++ b/pyhope/mesh/fem/fem.py
@@ -263,7 +263,7 @@ def FEMConnect() -> None:
 
     # > 5. Generate final edge keys for all raw edges
     nEdgesRaw  = len(edgesRaw)
-    edgeKeys   = [_] * nEdgesRaw
+    edgeKeys   = [()] * nEdgesRaw
     edgeKeySet = set()
     for i, (elemID, locEdge, (n0, n1)) in enumerate(edgesRaw):
         # Get the initial representation of the edge