修复Python百度搜索程序错误：点击UI界面时触发链接

之前，程序存在一个错误，即只要点击UI界面，不管点没点击网址，都会触发open_url()函数。

这次修复了错误，并确保只有在点击链接文本时才会触发open_url()函数。现在，当用户点击链接时，将在默认浏览器中打开对应的网页。

以下是修复后的代码：

import requests
from bs4 import BeautifulSoup
import time
import tkinter as tk
import webbrowser

def crawl_baidu(keyword):
    headers = {
        "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36"
    }
    url = f"https://www.baidu.com/s?wd={keyword}"
    time.sleep(2)  # 添加延迟
    response = requests.get(url, headers=headers)
    soup = BeautifulSoup(response.text, "html.parser")

    results = []
    for result in soup.find_all("div", class_="result"):
        result_url = result.find("a")["href"]
        results.append(result_url)

    return results

def open_url(event):
    tag_ranges = result_text.tag_ranges("link")
    click_index = event.widget.index(tk.CURRENT)
    for index, tag_range in enumerate(tag_ranges):
        if result_text.compare(click_index, ">=", tag_range[0]) and result_text.compare(click_index, "<", tag_range[1]):
            url = result_text.get(tag_range[0], tag_range[1])
            webbrowser.open(url)
            break

def search():
    keyword = entry.get()
    search_results = crawl_baidu(keyword)
    if len(search_results) > 0:
        for url in search_results:
            result_text.insert(tk.END, url + "\n", "link")
            result_text.tag_configure("link", foreground="blue", underline=True)
            result_text.insert(tk.END, "\n")
            result_text.insert(tk.END, "------------------------\n")
            result_text.insert(tk.END, "\n")
            result_text.tag_add("link", tk.END + "-2l", tk.END)
            result_text.tag_bind("link", "<Button-1>", open_url)
    else:
        result_text.insert(tk.END, "没有搜索结果\n")

# 创建UI界面
window = tk.Tk()
window.title("百度搜索")
window.geometry("800x600")

label = tk.Label(window, text="请输入关键词:")
label.pack()

entry = tk.Entry(window)
entry.pack()

search_button = tk.Button(window, text="搜索", command=search)
search_button.pack()

result_text = tk.Text(window)
result_text.pack()

window.mainloop()

非常抱歉之前的错误，感谢您的耐心和指正！如果还有其他问题，请随时提问。