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Python Socket Programming - ConnectionRefusedError: [WinError 10061] No connection could be made because the target machine actively refused it

I'm doing an assignment regarding socket programming in python using a client and server. I'm currently on windows 10. Before getting into the little details of the assignment, I've been trying to simply connect the server and client.

Every time I try to run the client file, I would get this error

File "tcpclient.py", line 9, in <module>
    s.connect((host, port))
ConnectionRefusedError: [WinError 10061] No connection could be made because the target machine actively refused it
I have opened the firewall ports and still nothing. I've tried replacing host with '', 0.0.0.0, socket.gethostname() in both the client and server file but the error still persists. I've even tried different port numbers but it made no difference. I've tried running this code on Ubuntu and Max and I get the same error - connection refused. I've been researching for many solutions but I still have yet to find one that works. Any help would be greatly appreciated!
Note: this code was taken online but it's essentially the basis of what I need to accomplish.
tcpclient.py 
import socket
host = '127.0.0.1'
port = 80
buffer_size = 1024
text = "Hello, World!"
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((host, port))
s.send(text)
data = s.recv(buffer_size)
s.close()
print("received data:", data)
tcpserver.py
import socket
host = '127.0.0.1'
port = 80
buffer_size = 20  
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind((host, port))
s.listen(1)
conn, addr = s.accept()
print 'Connection address:', addr
while 1:
    data = conn.recv(buffer_size)
if not data: break
print("received data:", data)
conn.send(data)  # echo
conn.close()
                You are starting the server before trying the client, right?  (Note also that port numbers below 1024 often require privilege to listen on.)
– Davis Herring
                Feb 16, 2019 at 21:04
                i've tried running the server first but every time I do my terminal just gets stuck and I can't ctrl+x or ctrl+c my way out. I've also tried running the client and server at the same time but I would still get the same error for client and then get stuck in the terminal because of the server.
– xerop
                Feb 16, 2019 at 21:13
                @DavisHerring I've tried using a port over 1024 and it worked! (on my ubuntu virtual box at least) I thought I had privileges on my windows but I guess not. Thank you :)
– xerop
                Feb 16, 2019 at 21:35
buffer_size = 1024
text = "Hello, World!"
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((host, port))
text = text.encode('utf-8')
s.send(text)
data = s.recv(buffer_size)
s.close()
print("received data:", data)
For server.py
import socket
mysocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
buffer_size = 1024
text = "Hello, World!"
mysocket.bind(('127.0.0.1', 9879))
mysocket.listen(5)
(client, (ip,port)) = mysocket.accept()
print(client, port)
client.send(b"knock knock knock, I'm the server")
data = client.recv(buffer_size)
print(data.decode())
mysocket.close()
Just change the port number and it will work and if you are in python3 then you will have to encode and decode as socket recieves and sends only binary strings.
So that the python script could user all interfaces in the server
2.I have find the question's error through the prompt:
  
TypeError: a bytes-like object is required, not 'str'
It means every string message in the 'send' method need to convert to 'bytes-like object',So the correct is
  
s.send(b"hello")
It is important that this is b'hello' not is     'hello'
        
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