Python发送已知字节

Question

I want to send a stream of known bytes over the network, such as 0020ff00 , but I want to use other method beside concatenation of char symbols. Can you provide me with another, more elegant method? Thanks

def send_connect_request(sock):
    print('Sending connect request...')
    sock.send('' + chr(2) + chr(0) + chr(0) + chr(0) + chr(255) + chr(0))   
    # sock.shutdown(1)

change to

def send_connect_request(sock):
    print('Sending connect request...')
    sock.send(0x0002ff00)       
    # sock.shutdown(1)

Answer 1

If you know the bytes, use a bytes literal:

sock.send(b'\x02\x00\x00\x00\xff\x00')

If you really don't want to type out all the escape-sequences, use the bytes constructor with a list of int s:

sock.send(bytes([2,0,0,0,255,0]))