PYTHONPATH in cell.

doc/erko_howto_tools.txt

@@ -1591,6 +1591,13 @@ Check of SDPTR op dop369 actief is met:
 > uals -u 10.87.2.36:4840 -p "0:Objects"
 
 
+# Add rtdsp module path to $PYTHONPATH in a cell
+import os
+import sys
+module_path = os.path.abspath(os.path.join('../'))
+if module_path not in sys.path:
+    sys.path.insert(0, module_path)
+
 *******************************************************************************
 * Graphana
 *******************************************************************************