diff --git a/daliuge-engine/test/test_droputils.py b/daliuge-engine/test/test_droputils.py
index 07b93a43a..529ec9c33 100644
--- a/daliuge-engine/test/test_droputils.py
+++ b/daliuge-engine/test/test_droputils.py
@@ -32,7 +32,7 @@
 
 from dlg import droputils
 from dlg.common import dropdict, Categories
-from dlg.drop import InMemoryDROP, FileDROP, BarrierAppDROP, PlasmaDROP, SharedMemoryDROP
+from dlg.drop import InMemoryDROP, FileDROP, BarrierAppDROP, PlasmaDROP
 from dlg.droputils import DROPFile
 
 
diff --git a/docs/development/app_development/pyfunc_components.rst b/docs/development/app_development/pyfunc_components.rst
index 82601186c..6e6fc1d23 100644
--- a/docs/development/app_development/pyfunc_components.rst
+++ b/docs/development/app_development/pyfunc_components.rst
@@ -11,16 +11,14 @@ Port Parsers
 
 Pyfunc components when interfacing with data drops may utilize one of several builtin port parsing formats.
 
-* Pickle
-* Eval
-* Path
-* Url
-* Npy
+* Pickle - Reads and writes data to pickle format
+* Eval - Reads data using eval() function and writes using repr() function
+* Npy - Reads and writes to .npy format
+* Path - Reads the drop path rather than data
+* Url - Reads the drop url rather than data
 
-Basic setup
------------
 
 Note
-----
+""""
 
-Only a single parser and 
\ No newline at end of file
+Only a single port parser can currently be used for all input ports of a Pyfunc. This is subject to change in future.