Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.python > #104394

Re: Pickle __getstate__ __setstate__ and restoring n/w - beazley pg 172

Show all headers | View raw

"Veek. M" <vek.m1234@gmail.com> writes:

> import socket
> class Client(object):
>  def __init__(self,addr):
>   self.server_addr = addr
>   self.sock = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
>   self.sock.connect(addr)
>
>  def __getstate__(self):
>   return self.server_addr
>  
>  def __setstate__(self,value):  
>   self.server_addr = value
>   self.sock = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
>   self.sock.connect(self.server_addr)
> -----------------
>
> We'd use it like so:
> x = Client(192.168.0.1)
> import pickle
> pickle.dump(x) #getstate gets called and returns IP for pickling.
>
> #program exits, we restart it
> x=Client(None)
> x = pickle.load(fh) #Is the IP passed to setstate??????
> x.__setstate__(self, unpickledIP) ???
> Is this correct?

Not completely.

"pickle" operates on objects - and calls "__getstate__" and "__setstate__"
internally. Thus, you get something like:

      client = Client()
      pickle.dump(client, open(fn, "wb"))
      ....
      recreated_client = pickle.load(open(fn, "rb"))

Back to comp.lang.python | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Pickle __getstate__ __setstate__ and restoring n/w - beazley pg 172 "Veek. M" <vek.m1234@gmail.com> - 2016-03-07 18:17 +0530
  Re: Pickle __getstate__ __setstate__ and restoring n/w - beazley pg 172 dieter <dieter@handshake.de> - 2016-03-09 09:10 +0100
    Re: Pickle __getstate__ __setstate__ and restoring n/w - beazley pg 172 "Veek. M" <vek.m1234@gmail.com> - 2016-03-09 14:44 +0530
      Re: Pickle __getstate__ __setstate__ and restoring n/w - beazley pg 172 Ian Kelly <ian.g.kelly@gmail.com> - 2016-03-09 14:28 -0700
        Re: Pickle __getstate__ __setstate__ and restoring n/w - beazley pg 172 "Veek. M" <vek.m1234@gmail.com> - 2016-03-10 06:31 +0530
      Re: Pickle __getstate__ __setstate__ and restoring n/w - beazley pg 172 dieter <dieter@handshake.de> - 2016-03-10 09:06 +0100

csiph-web