Arg doc

contrib/Python/cntk/context.py

@@ -368,7 +368,7 @@ class LocalExecutionContext(AbstractContext):
         name (str): context name
         device_id (int): whether to use CPU (-1) or GPU if `device_id>=0`, in which case it denotes the GPU index
         precision (str): either float or double
-        clean_up: whether the temporary directory should be removed when the context is left        
+        clean_up (bool): whether the temporary directory should be removed when the context is left        
     '''
 
     def __init__(self, name,
@@ -389,7 +389,6 @@ class LocalExecutionContext(AbstractContext):
         del _CONTEXT[self.name]
         if self.clean_up:
             sh.rmtree(self.directory)
-
         
     def _call_cntk(self, config_file_name, config_content, action_name):
         '''