disable stdout when invoking flow scripts (#763)

flow-project · Oct 26, 2019 · f174056 · f174056
1 parent 0a188f5
commit f174056
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Showing 2 changed files with 5 additions and 1 deletion.
diff --git a/flow/core/kernel/network/traci.py b/flow/core/kernel/network/traci.py
@@ -515,6 +515,7 @@ def generate_net(self,
                 ' --output-file=' + self.cfg_path + self.netfn +
                 ' --no-internal-links="false"'
             ],
+            stdout=subprocess.DEVNULL,
             shell=True)
 
         # collect data from the generated network configuration file

diff --git a/flow/core/kernel/simulation/traci.py b/flow/core/kernel/simulation/traci.py
@@ -142,7 +142,10 @@ def start_simulation(self, network, sim_params):
 
                 # Opening the I/O thread to SUMO
                 self.sumo_proc = subprocess.Popen(
-                    sumo_call, preexec_fn=os.setsid)
+                    sumo_call,
+                    stdout=subprocess.DEVNULL,
+                    preexec_fn=os.setsid
+                )
 
                 # wait a small period of time for the subprocess to activate
                 # before trying to connect with traci