python爬虫，爬出来和源码不同

求教，爬移民家园的网站，爬不到有效内容，这是为什么，怎么才能爬到具体的帖子内容？（附图是用下面的代码爬下来的内容）

import urllib.request
url = "https://www.yiminjiayuan.com/forum.php?mod=forumdisplay&fid=189&filter=lastpost&orderby=lastpost"
headers = {
"User-Agent": "Mozilla/5.0(Windows NT 6.1; Win64; x64) AppleWebKit/537.36(KHTML, like  Gecko) Chrome/75.0.3770.142  Safari/537.36",
"Referer": "https://www.yiminjiayuan.com/forum.php?mod=forumdisplay&fid=189&filter=lastpost&orderby=lastpost"
}
req = urllib.request.Request(url=url, headers=headers)
response = urllib.request.urlopen(req)
html = response.read().decode("utf-8")
print(html)

回答

需要带上cookie才有数据，用一个seesion访问2次就行了

import requests
url = "https://www.yiminjiayuan.com/forum.php?mod=forumdisplay&fid=189&filter=lastpost&orderby=lastpost"
headers = {
    "User-Agent": "Mozilla/5.0(Windows NT 6.1; Win64; x64) AppleWebKit/537.36(KHTML, like  Gecko) Chrome/75.0.3770.142  Safari/537.36",
 "Referer": "https://www.yiminjiayuan.com/forum.php?mod=forumdisplay&fid=189&filter=lastpost&orderby=lastpost",
#"Cookie": "agZD_b1dd_saltkey=s88c1OTO; agZD_b1dd_lastrequest=da9fBUNoIWsWCDoenEkJt1v2UMl1NFvuWruxtrWGzzWv%2FGdOzvGY",
}
s = requests.session()
content = s.get(url=url, headers=headers).content
content = s.get(url=url, headers=headers).content
print content.decode('gbk','ignore')

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