server.py

import socket
IP = socket.gethostbyname(socket.gethostname())
PORT = 4455
ADDR = (IP, PORT)
FORMAT = "utf-8"
SIZE = 1024
def main():
    server= socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    server.bind(ADDR)
    server.listen()
    print("[LISTENING] Server is listening. ")

    while True:
        conn, addr = server.accept()
        print(f"[NEW CONNECTION] {addr} connected.")

        filename = conn.recv(SIZE).decode(FORMAT)
        print(filename)
        print("[RECV] Filename received")
        file = open(filename, "w")
        conn.send("Filename received.".encode(FORMAT))
        data = conn.recv(SIZE).decode(FORMAT)

        print(f"[RECV]  File data received.")

        file.write(data)
        conn.send("File data received.".encode(FORMAT))

        file.close()
        conn.close()
        print(f"[DISCONNECTED] Server has ended")

if __name__ == "__main__":
    main()