Store object in HDFStore.
Fast writing/reading. Not-appendable, nor searchable.
Write as a PyTables Table structure which may perform
worse but allow more flexible operations like searching
/ selecting subsets of the data.
This will force Table format, append the input data to the
List of columns to create as data columns, or True to
use all columns. See here.
Provide an encoding for strings.
The store settable by the option ‘io.hdf.dropna_table’.