list-ops: add topics
list-ops: add topics

pheanex/xpython,N-Parsons/exercism-python,smalley/python,behrtam/xpython,pheanex/xpython,exercism/python,N-Parsons/exercism-python,mweb/python,exercism/xpython,exercism/xpython,behrtam/xpython,jmluy/xpython,jmluy/xpython,mweb/python,exercism/python,smalley/python