From e023960f6181ef7d3edd835ebcc13be89a26a707 Mon Sep 17 00:00:00 2001
From: RichieHakim <RichHakim@gmail.com>
Date: Mon, 18 Mar 2024 01:59:05 -0400
Subject: [PATCH] bug fix

---
 bnpm/optimization.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/bnpm/optimization.py b/bnpm/optimization.py
index b0ffb6b..4ef6c1a 100644
--- a/bnpm/optimization.py
+++ b/bnpm/optimization.py
@@ -320,5 +320,6 @@ def check(
             study.stop()
             
         if self.verbose:
-            print(f'Trial num: {self.num_trial}. Duration: {duration:.3f}s. Best value: {self.best:3e}. Current value:{trial.value:3e}') if self.verbose else None
+            best, value = (f"{val:3e}" for val in [self.best, trial.value] if val is not None)
+            print(f'Trial num: {self.num_trial}. Duration: {duration:.3f}s. Best value: {best:3e}. Current value: {value:3e}') if self.verbose else None
         self.num_trial += 1