Copy data type
output_type_id = H5T.copy(type_id)
output_type_id = H5T.copy(type_id) copies
the existing data type identifier, a dataset identifier specified
by type_id, or a predefined data type such as 'H5T_NATIVE_DOUBLE'. output_type_id is
a data type identifier.
type_id = H5T.copy('H5T_NATIVE_DOUBLE');
type_size = H5T.get_size(type_id);