import tkinter as tk import requests from bs4 import BeautifulSoup def scan(): url = entry.get() res = requests.get(url) soup = BeautifulSoup(res.text, 'html.parser') links = soup.find_all('a') for link in links: print(link.get('href')) root = tk.Tk() root.title('Web Scanner') label = tk.Label(root, text='Enter URL:') label.pack() entry = tk.Entry(root) entry.pack() button = tk.Button(root, text='Scan', command=scan) button.pack() root.mainloop() 帮我写一个注释

# 导入必要的模块
import tkinter as tk
import requests
from bs4 import BeautifulSoup

# 定义一个函数，用于扫描网页并输出链接
def scan():
# 获取用户输入的网址
url = entry.get()
# 发送请求并获取响应内容
res = requests.get(url)
# 使用 BeautifulSoup 解析响应内容
soup = BeautifulSoup(res.text, 'html.parser')
# 查找所有的链接标签
links = soup.find_all('a')
# 遍历所有的链接标签并输出链接
for link in links:
print(link.get('href'))

# 创建一个窗口对象
root = tk.Tk()
# 设置窗口标题
root.title('Web Scanner')

# 创建一个标签对象并添加到窗口中
label = tk.Label(root, text='Enter URL:')
label.pack()

# 创建一个文本框对象并添加到窗口中
entry = tk.Entry(root)
entry.pack()

# 创建一个按钮对象并添加到窗口中
button = tk.Button(root, text='Scan', command=scan)
button.pack()

# 进入消息循环，等待用户操作
root.mainloop()