BlockingIOError: [WinError 10035] A non-blocking socket operation could not be completed immediately

When running the example multiconn-client and multiconn-server I get an error:

D:\git\PythonSocketProgramming\PythonSocketProgramming>python multiconn-client.py '127.0.0.1' 65432 1
starting connection 1 to ('127.0.0.1', 65432)
Traceback (most recent call last):
File "multiconn-client.py", line 60, in
start_connections( host, int(port), int(num_cons) )
File "multiconn-client.py", line 21, in start_connections
sock.connect( server_addr )
BlockingIOError: [WinError 10035] A non-blocking socket operation could not be completed immediately

从 multiconn-client.py 第 21 行开始，该行中 start_connections 调用 sock.connect(server_addr)，并在 Windows 上复现针对 multiconn-server.py 显示的命令。确定非阻塞连接应如何完成，并定义使示例能够运行且不出现报告的 BlockingIOError 所需的更改。