def read_extra_meas_info(fid, tree, info):
    'Read extra blocks from fid'
    blocks = [FIFF.FIFFB_EVENTS, FIFF.FIFFB_HPI_RESULT, FIFF.FIFFB_HPI_MEAS, FIFF.FIFFB_PROCESSING_HISTORY]
    info['orig_blocks'] = blocks
    fid_str = BytesIO()
    fid_str = start_file(fid_str)
    start_block(fid_str, FIFF.FIFFB_MEAS_INFO)
    for block in blocks:
        nodes = dir_tree_find(tree, block)
        copy_tree(fid, tree['id'], nodes, fid_str)
    info['orig_fid_str'] = fid_str
Read extra blocks from fid
def read_extra_meas_info(fid, tree, info):
    
    blocks = [FIFF.FIFFB_EVENTS, FIFF.FIFFB_HPI_RESULT, FIFF.FIFFB_HPI_MEAS, FIFF.FIFFB_PROCESSING_HISTORY]
    info['orig_blocks'] = blocks
    fid_str = BytesIO()
    fid_str = start_file(fid_str)
    start_block(fid_str, FIFF.FIFFB_MEAS_INFO)
    for block in blocks:
        nodes = dir_tree_find(tree, block)
        copy_tree(fid, tree['id'], nodes, fid_str)
    info['orig_fid_str'] = fid_str