Python ChatGPT 聊天机器人：限制消息长度并发送网络请求

def send_message():
    global chat_history
    
    message_text = message_entry.get()
    if not message_text:
        return
    
    # 获取前10次的对话记录
    last_10_messages = chat_history[-10:]
    chat_history.append(f'你: {message_text}
')
    
    # 拼接消息和历史记录
    message_with_history = '\n'.join(last_10_messages) + chat_history[-1]
    
    # 判断消息长度是否超过4000字符
    while len(message_with_history.encode('utf-8')) > 4000:
        last_10_messages.pop(0)
        message_with_history = '\n'.join(last_10_messages) + chat_history[-1]
    
    chat_box.config(state=tk.NORMAL)
    chat_box.insert(tk.END, chat_history[-1], 'right_align')
    chat_box.see(tk.END)
    chat_box.config(state=tk.DISABLED)
    message_entry.delete(0, tk.END)

    # 显示动态等待效果
    wait_label.config(text='等待响应中...', fg='gray')
    root.update()

    # 发送网络请求
    response = requests.get('https://chatgpt-chatpt-zggoappkts.cn-beijing.fcapp.run', params={'content': message_with_history})

    if response.status_code == 200:
        response_text = response.text
        chat_history.append(f'chatgpt: {response_text}
\n')
        chat_box.config(state=tk.NORMAL)
        chat_box.insert(tk.END, chat_history[-1], 'left_align')
        chat_box.see(tk.END)
        chat_box.config(state=tk.DISABLED)
        wait_label.config(text='')
        
        # 保存消息到本地
        with open('chat_history.txt', 'a') as f:
            f.write(chat_history[-2])
            f.write(chat_history[-1])
    else:
        messagebox.showerror('错误', f'服务器状态码 {response.status_code}')
        wait_label.config(text='')

在拼接消息和历史记录后，加入判断消息长度是否超过4000字符。如果超过就将最早的历史记录弹出，重新拼接消息和历史记录，直到消息长度小于等于4000字符为止。