[Python] How I can connect to another computer using a socket?

I try this code:

server:

import socket

s=socket.socket()

ip='localhost'
port=9999
s.bind((ip,port))
s.listen()
print("wait for client...")
c,addr=s.accept()
print("client added!")
while True:
msg=input("your masage:>>>")
c.send(msg.encode())
print(c.recv(1000000).decode())


client:

import socket

s=socket.socket()

ip='localhost'
port=9999

s.connect((ip,port))
print("connected")
while True:
print(s.recv(1000000).decode())
msg=input("your masage:>>>")
s.send(msg.encode())


and I get this error in the client:

Traceback (most recent call last):
File "F:\chat room\client\chat room-client.py", line 8, in <module>
s.connect((ip,port))
ConnectionRefusedError: [WinError 10061] No connection could be made because the target machine actively refused it


I try this on 2 computers and I was getting error but when I try this on 1 computer I don't get any error and the program work.

(please write code for answer)

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