Append to Table in file. Node must already exist and be Table
Format to use when storing object in HDFStore. Value can be one of:
Table format. Write as a PyTables Table structure which may perform
worse but allow more flexible operations like searching / selecting
subsets of the data.
Append the input data to the existing.
List of columns to create as indexed data columns for on-disk
queries, or True to use all columns. By default only the axes
of the object are indexed. See here.
Do not write an ALL nan row to the store settable
by the option ‘io.hdf.dropna_table’.
Does not check if data being appended overlaps with existing
data in the table, so be careful