multiprocessing.connection.Client not support IPV6

Bug report

1、Test Code:

from multiprocessing.connection import Client
address = ('fe80::01',9999,0,0)

with Client(address,family='AF_INET6', authkey=b'1') as conn:
    print(conn.recv())

2、Error message

Traceback (most recent call last):
  File "c:\Users\Tiger\Desktop\http\c.py", line 5, in <module>
    with Client(address,family='AF_INET6', authkey=b'1') as conn:
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\Tiger\AppData\Local\Programs\Python\Python311\Lib\multiprocessing\connection.py", line 501, in Client
    c = SocketClient(address)
        ^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\Tiger\AppData\Local\Programs\Python\Python311\Lib\multiprocessing\connection.py", line 629, in SocketClient
    s.connect(address)
TypeError: AF_INET address must be a pair (host, port)

3、Causes and Solutions
Snippets of code in lib/multiprocessing/connection.py

def address_type(address):
    '''
    Return the types of the address

    This can be 'AF_INET', 'AF_UNIX', or 'AF_PIPE'
    '''
    if type(address) == tuple:
        return 'AF_INET'  
    elif type(address) is str and address.startswith('\\\\'):
        return 'AF_PIPE'
    elif type(address) is str or util.is_abstract_socket_namespace(address):
        return 'AF_UNIX'
    else:
        raise ValueError('address type of %r unrecognized' % address)

An ipv6 address is a four-tuple，the code for the following sentence should be perfected

   if type(address) == tuple:
        return 'AF_INET'  

The modified code is as follows：

if type(address) == tuple:
        if len(address)==2:
            return 'AF_INET'
        else:
            return 'AF_INET6'

That's all, ok!

4、A more complete solution
"lib/multiprocessing/connection.py"

Modify the SocketClient function，add parameters family，......
def SocketClient(address,family=None):

Linked PRs

• gh-99969

Start with lib/multiprocessing/connection.py and the supplied Client reproduction using an AF_INET6 four-tuple. Trace address_type and SocketClient, then verify that an IPv6 Client connection no longer raises the AF_INET pair error; the issue also links PR gh-99969 for related work.