rebuild bagfile from csv with Error: 'list' object has no attribute 'header'

edit

So to solve this part, first manuall create a class according to tfMessage().transforms[0] structure, and then include this class in the tfMessage().transforms emply list (be aware of the variables' type):

import csv
import rospy
import rosbag
from tf.msg import tfMessage

class tf_message:
    class header:
        seq = []
        class stamp():
            secs = []
            nsecs = []
        frame_id = []
    child_frame_id = []
    class transform():
        class translation():
            x = []
            y = []
            z = []
        class rotation():
            x = []
            y = []
            z = []
            w = []

    def __init__(self,_seq,_secs,_nsecs,
                _frame_id,_child_frame_id,
                _trans_x,_trans_y,_trans_z,
                _rot_x,_rot_y,_rot_z,_rot_w):
        self.header.seq = _seq
        self.header.stamp.secs = _secs
        self.header.stamp.nsecs = _nsecs
        self.header.frame_id = _frame_id
        self.child_frame_id = _child_frame_id
        self.transform.translation.x = _trans_x
        self.transform.translation.y = _trans_y
        self.transform.translation.z = _trans_z
        self.transform.rotation.x = _rot_x
        self.transform.rotation.y = _rot_y
        self.transform.rotation.z = _rot_z
        self.transform.rotation.w = _rot_w

with rosbag.Bag('rebuild.bag', 'w') as bag:
    with open('tf.csv', 'r') as csvFile:
        reader = csv.reader(csvFile)
        for row in reader:
            tf_msg = tfMessage()
            sample_message = tf_message(_seq, _secs, _nsecs,
                                        _frame_id, _child_frame_id,
                                        _trans_x, _trans_y, _trans_z,
                                        _rot_x, _rot_y, _rot_z, _rot_w)
            tf_msg.transforms = [sample_message]