#!/usr/bin/env python3
import socket, select

def drain(sock: socket.socket):
    rlist = [sock]
    while True:
        ready, _, _ = select.select(rlist, [], [], .0)
        if len(ready) == 0: break
        sock.recv(65535)

def wait(sock: socket.socket):
    rlist = [sock]
    while True:
        ready, _, _ = select.select(rlist, [], [])
        if len(ready) > 0: break