Options API enhancements

[changhiskhan]

getitem/setitem magic:

pd.options['expand'] = True

context manager for temporary options setting:

with pd.set_option('expand', False):
    ...

[ghost]

you're completely right about the context manager, will do.

Don't see the upside for doing item magic:

• not more concise
• no tooltip in ipython
• doesn't have room for expressing reset/describe
• too many ways to do the same thing

at least doing pd.options.print.max_cols would get you tab-completion
and express the hirerchy of keys in a natural way.

Unless it's really that annoying for everyone, I suggest leaving as is.

[changhiskhan]

fair point, was thinking people might be more familiar with dict-like access to options, but i think it's fine to leave as is.

no urgency on the context manager either, just jotting down my thoughts

[wesm]

IPython tab completion magic would be very nice e g.

options.print.line_width = 120

[ghost]

done and done via cc2a22a