1 files changed, 5 insertions, 1 deletions

diff --git a/python/gats.py b/python/gats.py
index 40139a2..22463ab 100644
--- a/python/gats.py
+++ b/python/gats.py
@@ -146,6 +146,8 @@ def _readObj( sIn ):
                         return 0.0
                 else:
                         raise Exception('Invalid exceptional float subtype found.')
+        elif t == 'n':
+                return None
         elif t == 'e':  # End marker
                 return None
         else:
@@ -153,7 +155,9 @@ def _readObj( sIn ):
         return 'not implemented yet';
 
 def _writeObj( obj, sOut ):
-        if isinstance( obj, bool ):
+        if obj is None:
+                sOut.write('n')
+        elif isinstance( obj, bool ):
                 if obj == True:
                         sOut.write('1')
                 else: