Only the notebook inputs (and optionally, the metadata) are included. Text notebooks are well suited for version control. You can also edit or refactor them in an IDE - the .py notebook above is a ...

>>> print yahoo. get_historical ('2014-04-25', '2014-04-29') [{u'Volume': u'28720000', u'Symbol': u'YHOO', u'Adj_Close': u'35.83', u'High': u'35.89', u'Low': u'34.12 ...