Fix by Tural Mammadov

Author: andreas-zeller

notebooks/Tracer.ipynb

@@ -670,7 +670,9 @@
     "\n",
     "        if event == 'line':\n",
     "            module = inspect.getmodule(frame.f_code)\n",
-    "            if module:\n",
+    "            if module is None:\n",
+    "                source = inspect.getsource(frame.f_code)\n",
+    "            else:\n",
     "                source = inspect.getsource(module)\n",
     "            if source:\n",
     "                current_line = source.split('\\n')[frame.f_lineno - 1]\n",