请帮我优化这段代码。 import socket s = socket.socket() print("发送端创建成功") s.bind(('localhost', 8998)) s.listen(3) print("等待连接") # s.settimeout(15.0) c, addr = s.accept() print("ip地址和端口号", addr) ack_expected = "1" ack = "0" while True: frame = input("输入要发送的信息") c.send(bytes(frame, 'utf-8')) while ack_expected != ack: try: c.settimeout(10.0) ack = c.recv(1024).decode() while ack_expected != ack: print(frame, "ack值不正确，验证失败，信息重新发送!") c.send(bytes(frame, 'utf-8')) ack = c.recv(1024).decode() except socket.timeout: while ack_expected != ack: print(frame, "超时10s，信息将重新发送!!") break print("验证通过，信息成功传输") stop_connection = input("输入'yes'以关闭连接,输入'no'以继续传输数据") if stop_connection == "yes": print("连接已关闭") c.close() s.close() break if ack_expected == "0": ack_expected = "1" else: ack_expected = "0"

可以考虑以下几点来优化代码：

1. 使用with语句来管理socket连接，避免手动关闭连接时出现异常

2. 将重复的代码逻辑封装成函数，使代码更加简洁、易读

3. 使用异常处理机制来处理网络连接中的异常情况

下面是优化后的代码：

import socket

def send_data(c, frame, ack_expected):
    # 发送数据
    c.send(bytes(frame, 'utf-8'))
    ack = None
    while ack_expected != ack:
        try:
            # 设置接收超时时间为10秒
            c.settimeout(10.0)
            # 接收ack
            ack = c.recv(1024).decode()
            if ack_expected != ack:
                print(frame, "ack值不正确，验证失败，信息重新发送!")
                # 重新发送数据
                c.send(bytes(frame, 'utf-8'))
        except socket.timeout:
            print(frame, "超时10s，信息将重新发送!!")
            # 重新发送数据
            c.send(bytes(frame, 'utf-8'))
    print("验证通过，信息成功传输")

with socket.socket() as s:
    print("发送端创建成功")
    s.bind(('localhost', 8998))
    s.listen(3)
    print("等待连接")
    c, addr = s.accept()
    print("ip地址和端口号", addr)
    ack_expected = "1"
    ack = "0"
    while True:
        frame = input("输入要发送的信息")
        send_data(c, frame, ack_expected)
        stop_connection = input("输入'yes'以关闭连接,输入'no'以继续传输数据")
        if stop_connection == "yes":
            print("连接已关闭")
            c.close()
            break
        if ack_expected == "0":
            ack_expected = "1"
        else:
            ack_expected = "0"