Upgrading an instance to a subclass

[Antoon Pardon]

I have a subclass of socket.

class Mysocket (socket):
...

But when I use the python library it will of course
just return an instance of socket, like the SocketServer
module.

So now I was wondering if it is somehow possible to
turn this instance into a Mysocket instance, either
by somehow changing the original instance or producing
a new instance that represents the same connection.

 

[Orestis Markou]

I would suggest rather than inheriting from socket, encapsulate over it:

class MySocket(object):
def __init__(self, socket):
self.socket = socket

Then you don't have to worry about patching instances...

 

[Terry Reedy]

I have a subclass of socket.

class Mysocket (socket):
...

But when I use the python library it will of course
just return an instance of socket, like the SocketServer
module.

So now I was wondering if it is somehow possible to
turn this instance into a Mysocket instance, either
by somehow changing the original instance

Instances of Python-coded classes can usually have __class__ changed.
But not for builtin, C-coded classes, which I assume

> or producing
a new instance that represents the same connection.

Given that socket appears to be immutable, I believe Mysocket would need
a __new__ method that called socket.__new__. But I have never worked
with __new__ functions.