From b42187ee0be71a68c7b1ddc31c62f750dead5c01 Mon Sep 17 00:00:00 2001
From: Alinson S Xavier <axavier@anl.gov>
Date: Tue, 18 Aug 2020 10:51:00 -0500
Subject: [PATCH] Do not modify solver threads by default

---
 src/python/miplearn/solvers/learning.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/python/miplearn/solvers/learning.py b/src/python/miplearn/solvers/learning.py
index a150781..4f7be24 100644
--- a/src/python/miplearn/solvers/learning.py
+++ b/src/python/miplearn/solvers/learning.py
@@ -47,7 +47,7 @@ class LearningSolver:
                  gap_tolerance=None,
                  mode="exact",
                  solver="gurobi",
-                 threads=4,
+                 threads=None,
                  time_limit=None,
                  node_limit=None):
         self.components = {}
@@ -83,7 +83,8 @@ class LearningSolver:
             solver = self.internal_solver_factory()
         else:
             solver = self.internal_solver_factory
-        solver.set_threads(self.threads)
+        if self.threads is not None:
+            solver.set_threads(self.threads)
         if self.time_limit is not None:
             solver.set_time_limit(self.time_limit)
         if self.gap_tolerance is not None: