[已解决]问题求助

# 爬虫允许用户输入搜索的关键词，并显示结果

import urllib.request
import urllib.parse
import re
from bs4 import BeautifulSoup


def main():
    keyword = input('请输入关键词:')
    keyword = urllib.parse.urlencode({'word': keyword})
    response = urllib.request.urlopen('http://baike.baidu.com/search/word?%s' % keyword)
    html = response.read()
    soup = BeautifulSoup(html, 'html.parser')

    for each in soup.find_all(href=re.compile("item"))[7:-1]:
        content = ''.join([each.text])
        url2 = ''.join(['http://baike.baidu.com', each['href']])
        response2 = urllib.request.urlopen(url2)
        html2 = response2.read()
        soup2 = BeautifulSoup(html2, 'html.parser')
        if soup2.h2:
            content = ''.join([content, soup2.h2.text])
        content = ''.join([content, '_>', url2])
        print(content)


if __name__ == '__main__':
    main()