There is a bug in the current rendition of the Wikipedia API python library. You can introduce a branch by lucasdnd on Github that fixed this:
>>> import wikipedia
>>> ny = wikipedia.page("New York")
>>> ny.sections
[u'History', u'16th century', u'17th century', u'18th century, the American Revolution, and statehood', u'19th century', u'Immigration', u'September 11, 2001 attacks', u'Hurricane Sandy, 2012', u'Geography', u'Climate', u'Statescape', u'Regions', u'Adjacent geographic entities', u'State parks', u'National parks', u'Administrative divisions', u'Demographics', u'Population', u'Most populous counties', u'Major cities', u'Metropolitan areas', u'Racial and ancestral makeup', u'Languages', u'Religion', u'LGBT', u'Economy', u'Wall Street', u'Silicon Alley', u'Microelectronic hardware and photographic processing', u'Media and entertainment', u'Tourism', u'Exports', u'Education', u'Transportation', u'Government and politics', u'Government', u'Capital punishment', u'Federal representation', u'Politics', u'Sports', u'See also', u'References', u'Further reading', u'External links']
It'll ideally be fixed in the fundamental library in the near future.
For more details, do check out the below video tutorial...