rpn (1)>help
rpn help mode - 'topics' for a list of topics, 'exit' to return to rpn
rpn help>topics
Traceback (most recent call last):
File "rpn.py", line 608, in <module>
handleOutput( rpn( sys.argv[ 1 : ] ) )
File "rpn.py", line 575, in rpn
enterInteractiveMode( )
File "rpn.py", line 261, in enterInteractiveMode
enterHelpMode( terms[ 1 : ] )
File "rpn.py", line 309, in enterHelpMode
printInteractiveHelp( )
NameError: name 'printInteractiveHelp' is not defined