import socket

SEND_BUF_SIZE = 4096
RECV_BUF_SIZE = 4096

def modify_buff_size():
    sock = socket.socket( socket.AF_INET, socket.SOCK_STREAM )
    
    # Get the size of the socket's send buffer
    bufsize = sock.getsockopt(socket.SOL_SOCKET, socket.SO_SNDBUF)
    print("Buffer size [Before]:%d" %bufsize)
    
    sock.setsockopt(socket.SOL_TCP, socket.TCP_NODELAY, 1)
    sock.setsockopt(socket.SOL_SOCKET, socket.SO_SNDBUF, SEND_BUF_SIZE)
    sock.setsockopt(socket.SOL_SOCKET, socket.SO_RCVBUF, RECV_BUF_SIZE)
    bufsize = sock.getsockopt(socket.SOL_SOCKET, socket.SO_SNDBUF)
    print("Buffer size [After]:%d" %bufsize)

if __name__ == '__main__':
    modify_buff_size()