From 9135544d0aebe6ff31965452470d2dce888758a8 Mon Sep 17 00:00:00 2001
From: kirk0830 <67682086+kirk0830@users.noreply.github.com>
Date: Tue, 20 Jan 2026 14:49:30 +0800
Subject: [PATCH] Fix: close and clean the global instance plt in split_btd

To suppress the RuntimeWarning about too many figures have been opened.
---
 dpnegf/negf/split_btd.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dpnegf/negf/split_btd.py b/dpnegf/negf/split_btd.py
index 77e3bdf..33d17d6 100644
--- a/dpnegf/negf/split_btd.py
+++ b/dpnegf/negf/split_btd.py
@@ -1317,7 +1317,7 @@ def show_blocks(subblocks, input_mat, results_path):
     plt.ylim(-1.0, input_mat.shape[0] - 0.5)
     plt.axis('off')
     plt.savefig(results_path +'/subblocks_HK0.png', dpi=300)
-
+    plt.close()
 
 # if __name__ == "__main__":
 #     import doctest