diff --git a/class/LogicFunction.php b/class/LogicFunction.php
index fbf912c..ed8eea5 100644
--- a/class/LogicFunction.php
+++ b/class/LogicFunction.php
@@ -247,8 +247,8 @@ class LogicFunction implements JsonSerializable
         return join(" | ", $minterms);
     }
 
-    public function drawNetwork(string $fn, string $outvar = "f"): void {
-        PythonUtils::execPy("draw_logic_network.py", [ $this->getExpression(), $outvar, $fn ]);
+    public function drawNetwork(string $outvar = "f"): string {
+        return PythonUtils::execPy("draw_logic_network.py", [ $this->getExpression(), $outvar ]);
     }
 }
 
diff --git a/class/PythonUtils.php b/class/PythonUtils.php
index f2ffa17..b10b782 100644
--- a/class/PythonUtils.php
+++ b/class/PythonUtils.php
@@ -6,7 +6,7 @@ class PythonUtils
 {
     private const VENV = Utils::WORKSPACE_DIR . DIRECTORY_SEPARATOR . "venv";
 
-    public static function execPy(string $script, array $args): void
+    public static function execPy(string $script, array $args): string
     {
         $venv = getcwd() . DIRECTORY_SEPARATOR . self::VENV; // compose full venv path
         $ws = getcwd() . DIRECTORY_SEPARATOR . Utils::WORKSPACE_DIR; // compose full workspace path
@@ -14,6 +14,6 @@ class PythonUtils
         //$source_cmd = "source " . $venv . DIRECTORY_SEPARATOR . "bin" . DIRECTORY_SEPARATOR . "activate";
         $flattened_args = join(" ", array_map(fn($arg) => "'$arg'", $args)); // prepare arguments for use on command line
         $python_cmd = "bash $ws" . DIRECTORY_SEPARATOR . "py_exec.sh \"$ws" . DIRECTORY_SEPARATOR . $script . "\" " . $flattened_args . " 2>&1";
-        $ret = shell_exec($python_cmd); // execute python script
+        return shell_exec($python_cmd); // execute python script
     }
 }
\ No newline at end of file
diff --git a/class/Tasks/TruthTableTask.php b/class/Tasks/TruthTableTask.php
index d313cd2..c0a43a5 100644
--- a/class/Tasks/TruthTableTask.php
+++ b/class/Tasks/TruthTableTask.php
@@ -81,11 +81,10 @@ class TruthTableTask extends PicturedTask
     public function randomize(): void
     {
         if ($this->hasFlag("drawnetwork")) {
-            $svg_file = sys_get_temp_dir() . DIRECTORY_SEPARATOR . uniqid("truthtable_") . ".svg";
-            $this->lf->drawNetwork($svg_file);
-            $this->setImageData(file_get_contents($svg_file) ?? "");
+            ///$svg_file = sys_get_temp_dir() . DIRECTORY_SEPARATOR . uniqid("truthtable_") . ".svg";
+            $this->setImageData($this->lf->drawNetwork($this->output_variable));
             $this->setImageType("svg");
-            @unlink($svg_file);
+            //@unlink($svg_file);
         }
 
         parent::randomize();
diff --git a/workspace/draw_logic_network.py b/workspace/draw_logic_network.py
index 8bb066b..b2bb53e 100644
--- a/workspace/draw_logic_network.py
+++ b/workspace/draw_logic_network.py
@@ -2,8 +2,10 @@ import sys
 from schemdraw import logic
 from schemdraw.parsing import logicparse
 
-if len(sys.argv) < 4:
+if len(sys.argv) < 3:
     exit(0)
 
 network = logicparse(sys.argv[1], outlabel=sys.argv[2], gateH=1.2)
-network.save(sys.argv[3])
+#network.save(sys.argv[3])
+svg = network.get_imagedata()
+print(svg)