关于python 0基础第55课课后题
第55课的课后题动动手第一题要求用户可以自己输入内容,然后爬虫百度百科根据小甲鱼的答案运行不了,应该是网址变了,所以请问百度百科的新网址应该怎么看?
本帖最后由 Hoiste 于 2020-3-23 21:11 编辑
是改了,我记得答案好像只能搜出多肉百科和恐龙百科了,你如果看过网页源代码就会发现那些词条已经换了关键字了(view变成item),这是我当初学的时候根据情况改的代码,你看看能不能用,另外,后面那题同样也不能按答案来了,我也放上来吧。
1题:
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})
url = 'http://baike.baidu.com/search/word?%s' %keyword
response = urllib.request.urlopen(url)
html = response.read()
soup = BeautifulSoup(html,'html.parser')
#百度百科下该关键词作为多义词时的各个词条
for each in soup.find_all(href = re.compile('item')):
content = each.text
try:
url2 = ''.join(['http://baike.baidu.com',each['href']])
response2 = urllib.request.urlopen(url2)
except UnicodeEncodeError:
temp = each['href'].split('/')
key = urllib.parse.urlencode({'':temp}).split('=')
each['href'] = ''.join(['/item/',key])
url2 = ''.join(['http://baike.baidu.com',each['href']])
response2 = urllib.request.urlopen(url2)
finally:
html2 = response2.read().decode('utf-8')
soup2 = BeautifulSoup(html2,'html.parser')
if soup2.h2:
content = ''.join()
content = ''.join()
print(content)
if __name__ == '__main__':
main()
2题
import urllib.request
import urllib.parse
import re
from bs4 import BeautifulSoup
def get_url(soup):
for each in soup.find_all(href=re.compile('item')):
content = ''.join()
try:
url2 = ''.join(['http://baike.baidu.com',each['href']])
response2 = urllib.request.urlopen(url2)
except UnicodeEncodeError:
temp = each['href'].split('/')
each['href'] = urllib.parse.urlencode({'':temp}).split('=')
url2 = ''.join(['http://baike.baidu.com','/',each['href']])
response2 = urllib.request.urlopen(url2)
finally:
html2 = response2.read()
soup2 = BeautifulSoup(html2,'html.parser')
if soup2.h2:
content = ''.join()
content = ''.join()
yield content
def main():
keyword = input('请输入关键词:')
keyword = urllib.parse.urlencode({'word':keyword})
url = 'http://baike.baidu.com/search/word?%s' %keyword
response = urllib.request.urlopen(url)
html = response.read()
soup = BeautifulSoup(html,'html.parser')
result = soup.find(text=re.compile('百度百科尚未收录词条'))
if result:#如果未收录打印没有收录词条
result = result.split(' ”')#去掉奇怪的小尾巴
print(result)
else:#没有未收录词条的内容则打印标题、简介
title = soup.h1.text
if soup.h2:
title += soup.h2.text
print(title)
if soup.find(class_='lemma-summary'):
print(soup.find(class_='lemma-summary').text)
print('下边打印相关链接:')
#打印十个链接。。。好像要另起函数比较方便使用生成器来解决问题
each = get_url(soup)
while True:
try:
for i in range(10):
print(next(each))
except StopIteration:
break
Quit = input('任意键继续打印词条,按q取消:')
if Quit == 'q':
break
else:
continue
if __name__ == '__main__':
main()
Hoiste 发表于 2020-3-23 21:09
是改了,我记得答案好像只能搜出多肉百科和恐龙百科了,你如果看过网页源代码就会发现那些词条已经换了关键 ...
可以了,感谢!
第0题的时候我也会莫名其妙出来恐龙和多肉这种不相关的东西。。。
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