Attribute name read only

[Phirotest]

Traceback (most recent call last):
File "usedissector.py", line 3, in
from dissector import *
File "/root/Desktop/dissectors/dissector.py", line 41, in
from ftp import *
File "/root/Desktop/dissectors/ftp.py", line 383, in
class FTPData(Packet):
File "/root/Desktop/dissectors/ftp.py", line 389, in FTPData
fields_desc = [FTPDataField("data", "")]
File "/root/Desktop/dissectors/ftp.py", line 128, in init
self.name = name
AttributeError: 'FTPDataField' object attribute 'name' is read-only