From 0b26656cbad65c92c4ae11cd0681af5ee587d0b1 Mon Sep 17 00:00:00 2001
From: DONNOT Benjamin <benjamin.donnot@rte-france.com>
Date: Mon, 8 Apr 2024 15:06:39 +0200
Subject: [PATCH] silencing another warnings see #81

---
 lightsim2grid/newtonpf/newtonpf.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lightsim2grid/newtonpf/newtonpf.py b/lightsim2grid/newtonpf/newtonpf.py
index 59d9496..aa84f68 100644
--- a/lightsim2grid/newtonpf/newtonpf.py
+++ b/lightsim2grid/newtonpf/newtonpf.py
@@ -39,7 +39,7 @@ def _get_valid_solver(options, Ybus):
     else:
         solver = KLUSolverSingleSlack() if KLU_solver_available else SparseLUSolverSingleSlack()
 
-    if ~sparse.isspmatrix_csc(Ybus):
+    if not sparse.isspmatrix_csc(Ybus):
         Ybus = sparse.csc_matrix(Ybus)
 
     if not Ybus.has_canonical_format: