Syntax for multiple column selection
Occasionally I find myself and others wanting to select the same or or and conditions in a query. http://stackoverflow.com/questions/22093006/python-pandas-filter-dataframe-by-applying-regular-expression for example. 

Was just wondering if it might be useful to have a more convenient way to apply the same query to multiple columns without having to write or/and a bunch of times. Something that would translate to df[df[subset].eval("bool expression")] The pytables selection mechanism does something similar with a list. This smells like it could be feature bloat since it would be adding syntax but i could be convinced if it's useful. 
