Breaks exercises into sections, with title of notebook that each set comes from. Links back to appropriate pages.
Breaks exercises into sections, with title of notebook that each set comes from. Links back to appropriate pages.

chenleo/ipynotebook,chenleo/ipynotebook,ehmatthes/intro_programming,BadWizard/intro_programming,chenleo/ipynotebook,ehmatthes/intro_programming,BadWizard/intro_programming,chenleo/ipynotebook,nntisapeh/intro_programming,nntisapeh/intro_programming,BadWizard/intro_programming,nntisapeh/intro_programming,ehmatthes/intro_programming,ehmatthes/intro_programming,BadWizard/intro_programming,nntisapeh/intro_programming