博主第一次写博文，第一次学爬虫，就是想分享，大家见怪不怪，
首先我设置了一个自定义UA代理池并没有采用插件pip install fake-useragent形式进行随机获取print(ua.ie)
ua_list = [
'Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Maxthon 2.0',
'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_0) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/17.0.963.56 Safari/535.11',
'User-Agent:Opera/9.80 (Windows NT 6.1; U; en) Presto/2.8.131 Version/11.11',
'Mozilla/5.0 (Windows NT 6.1; rv:2.0.1) Gecko/20100101 Firefox/4.0.1',
'Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0)',
'Mozilla/5.0 (Windows; U; Windows NT 6.1; en-us) AppleWebKit/534.50 (KHTML, like Gecko) Version/5.1 Safari/534.50',
'Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0',
'Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1',
'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1',
'Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:2.0.1) Gecko/20100101 Firefox/4.0.1',
]
a = random.choice(ua_list)
print(a)中间出现不能获取rs1,通过查百度，最终改成如下程序
url = 'http://www.baidu.com/'
rs1 = ua_info.a
headers = {'User-Agent': rs1}
# 1、创建请求对象，包装ua信息
# req = request.Request(url=url, headers=headers)
query_string = {
'wd': '爬虫'
}
result = parse.urlencode(query_string)
url1 = 'http://www.baidu.com/s?{}'.format(result)
req = request.Request(url=url1, headers=headers)
res = urllib.request.urlopen(req)
html = res.read().decode('utf-8')
print(html)爬个五次吧，出现了下面结果
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="utf-8">
<title>百度安全验证</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black">
<meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0">
<meta name="format-detection" content="telephone=no, email=no">
<link rel="shortcut icon" href="https://www.baidu.com/favicon.ico" type="image/x-icon">
<link rel="icon" sizes="any" mask href="https://www.baidu.com/img/baidu.svg">
<meta http-equiv="X-UA-Compatible" content="IE=Edge">
<meta http-equiv="Content-Security-Policy" content="upgrade-insecure-requests">
<link rel="stylesheet" href="https://wappass.bdimg.com/static/touch/css/api/mkdjump_0635445.css" />
</head>
<body>
<div class="timeout hide">
<div class="timeout-img"></div>
<div class="timeout-title">网络不给力，请稍后重试</div>
<button type="button" class="timeout-button">返回首页</button>
</div>
<div class="timeout-feedback hide">
<div class="timeout-feedback-icon"></div>
<p class="timeout-feedback-title">问题反馈</p>
</div>查百度解决方案让我在headers中加个参数，并说明找到的位置，并且已经得到了解决，
headers = {
'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.97 Safari/537.36 Edg/83.0.478.50',
'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9'
}好奇之下我查了爬虫与反爬的对抗，如下