DOC: add import prefix to all pandas imports

[timmie]

in the docs, numpy is often imported with

from numpy import np

http://pandas.pydata.org/pandas-docs/dev/reshaping.html?highlight=curious

for an easier reuse, what about adopting

import pandas as pd

for the docs?

[wesm]

Yes-- been meaning to do this (import pandas as pd)

[timmie]

OK, then add me to this issue and also the community tag.

[konarkmodi]

Hi @timmie @wesm Is this still open ? If yes, I would like to work on this.

[jreback]

@konarkmodi sure

note that import pandas as pd is done in very file, but its just suppressed in the doc output

not a problem with putting a short 'these are the imports' at the top of each major section (only once)

[jorisvandenbossche]

Superceded by #9886