pickling and __safe_for_unpickling__

[Laura Falk]

I'm on my first python program and ran into a python error while
unpickling my items from a socket.  In reading the docs, I've found
that an attribute needs to be set __safe_for_unpickling__ but when
I try to set it but get an erro "object has read-only attributes".  I
set the attribute as follows (I'm probably setting it incorrectly)


class fileinfo:
        def __init__(self,file,cat,dir,name,dir_file,time,mode):
                self.file = file
                self.cat = cat
                self.dir = dir
                self.name = name
                self.dir_file = dir_file
                self.time = time
                self.mode = mode
                self.__safe_for_unpickling__=1


The docs also mention copy_reg so I removed the last line in the above 
and then placed the following outside the class and then used the
following:

copy_reg.constructor(fileinfo)


When I ran the program again, I got the following:

Traceback (most recent call last):
  File "./server.py", line 21, in ?
    accepter.unpackinfo(data)
  File "./accepter.py", line 16, in unpackinfo
    p._is_string_secure=1
TypeError: object has read-only attributes



I'm come to the conclusion that I'm thoroughly confused as to how I
need to tell python that my data is safe to unpickle.

Can anyone give me advice/help with this problem?  I'm very new to
python (I'm still in my first week since I started reading the book
and programming with python.)

Thanks very much for any help!!

--Laura Falk