Python爬虫入门
来源：互联网 发布：mysql中删除一个字段 编辑：程序博客网 时间：2024/05/16 07:30
为了研究Python爬虫，今天特别安装了相关环境，并简单运行了一个小示例。
环境(在Windows 10上用Hyper-V安装最新版Ubuntu)
OS: Ubuntu 17.04
Python：2.7.13
IDE: PyCharm
以下是基于上述环境运行的爬虫小示例：
import urllib
import urllib2
info = {}
info['username'] = "********"
info['password'] = "******"
data = urllib.urlencode(info)
url = "http://passport.csdn.net/account/login?from=http://my.csdn.net/my/mycsdn"
request = urllib2.Request(url,data)
response = urllib2.urlopen(request)
print response.read()
然后运行，运行结果如下：
<html>
<head>
<meta charset="utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge"/>
<meta property="qc:admins" content="24530273213633466654" />
<meta name="viewport" content="width=device-width, initial-scale=1.0"/>
<title>帐号登录</title>
<link type="text/css" rel="stylesheet" href="/css/bootstrap.css;jsessionid=63419DB743239B9DDDC0E079B7D98210.tomcat2" />
<link type="text/css" rel="stylesheet" href="/css/login.css;jsessionid=63419DB743239B9DDDC0E079B7D98210.tomcat2" />
<link type="text/css" rel="stylesheet" href="/css/weixinqr.css;jsessionid=63419DB743239B9DDDC0E079B7D98210.tomcat2" />
<script src="https://res.wx.qq.com/connect/zh_CN/htmledition/js/wxLogin.js"></script>
<!--[if lt IE 9]>
<script src="https://oss.maxcdn.com/libs/html5shiv/3.7.0/html5shiv.js"></script>
<script src="https://oss.maxcdn.com/libs/respond.js/1.3.0/respond.min.js"></script>
<![endif]-->
</head>
<body>
<div id="hidebg"></div>
<div id="hidebox"><div id="close" onClick="hide();"></div><div id="wxqr" class="wxqr"></div></div>
<script type="text/javascript">
var protocol = window.location.protocol;
document.write('<script type="text/javascript" src="' +protocol+ '//csdnimg.cn/pubfooter/js/repoAddr2.js?v=' + Math.random() + '"></'+'script>');
</script>
<div class="header"></div>
<div class="main">
<div class="container container-custom">
<div class="row wrap-login">
<div class="login-banner col-sm-6 col-md-7 col-lg-7 hidden-xs"><a href="http://edu.csdn.net/huiyiCourse/series_detail/32?ref6" target="_blank"><img src=../bgimage/login-banner.png;jsessionid=63419DB743239B9DDDC0E079B7D98210.tomcat2 class="img-responsive"></a></div>
<div class="login-user col-xs-12 col-sm-6 col-md-5 col-lg-5">
<div class="login-part">
<h3>帐号登录 </h3>
<div class="user-info">
<div class="user-pass">
<form id="fm1" action="/account/login;jsessionid=63419DB743239B9DDDC0E079B7D98210.tomcat2?from=http://my.csdn.net/my/mycsdn" method="post">
<input id="username" name="username" tabindex="1" placeholder="输入用户名/邮箱/手机号" class="user-name" type="text" value=""/>
<input id="password" name="password" tabindex="2" placeholder="输入密码" class="pass-word" type="password" value="" autocomplete="off"/>
<div class="error-mess" style="display:none;">
<span class="error-icon"></span><span id="error-message"></span>
</div>
<div class="row forget-password">
<span class="col-xs-6 col-sm-6 col-md-6 col-lg-6">
<input type="checkbox" name="rememberMe" id="rememberMe" value="true" class="auto-login" tabindex="4"/>
<label for="rememberMe">下次自动登录</label>
</span>
<span class="col-xs-6 col-sm-6 col-md-6 col-lg-6 forget tracking-ad" data-mod="popu_26">
<a href="/account/fpwd?action=forgotpassword&service=http%3A%2F%2Fmy.csdn.net%2Fmy%2Fmycsdn" tabindex="5">忘记密码</a>
</span>
</div>
<!-- 该参数可以理解成每个需要登录的用户都有一个流水号。只有有了webflow发放的有效的流水号，用户才可以说明是已经进入了webflow流程。否则，没有流水号的情况下，webflow会认为用户还没有进入webflow流程，从而会重新进入一次webflow流程，从而会重新出现登录界面。 -->
<input type="hidden" name="lt" value="LT-550272-a9paeBvlnfeYOgpie2l4PhwqizCAzy" />
<input type="hidden" name="execution" value="e1s1" />
<input type="hidden" name="_eventId" value="submit" />
<input class="logging" accesskey="l" value="登 录" tabindex="6" type="button" />
</form>
</div>
</div>
<div class="line"></div>
<div class="third-part tracking-ad" data-mod="popu_27">
<span>第三方帐号登录</span>
<span><font color="red"> </font></span>
<a href="https://api.weibo.com/oauth2/authorize?client_id=2601122390&response_type=code&redirect_uri=https%3A%2F%2Fpassport.csdn.net%2Faccount%2Flogin%3Foauth_provider%3DSinaWeiboProvider" class="sina"></a>
<a id="linkedinAuthorizationUrl" href="https://www.linkedin.com/uas/oauth2/authorization?response_type=code&client_id=75fvsy4v01jw1s&redirect_uri=https%3A%2F%2Fpassport.csdn.net%2Faccount%2Flogin%3Foauth_provider%3DLinkedInProvider&state=DCEEFWF45453sdffef424" class="linkin"></a>
<a id="baiduAuthorizationUrl" href="https://openapi.baidu.com/oauth/2.0/authorize?response_type=code&client_id=cePqkUpKCBrcnQtARTNPxxQG&redirect_uri=https%3A%2F%2Fpassport.csdn.net%2Faccount%2Flogin%3Foauth_provider%3DBaiduProvider" class="baidu"></a>
<a id="qqAuthorizationUrl" href="https://graph.qq.com/oauth2.0/authorize?response_type=code&client_id=100270989&redirect_uri=https%3A%2F%2Fpassport.csdn.net%2Faccount%2Flogin%3Foauth_provider%3DQQProvider&state=test" class="qq"></a>
<a id="githubAuthorizationUrl" href="https://github.com/login/oauth/authorize?client_id=4bceac0b4d39cf045157&redirect_uri=https%3A%2F%2Fpassport.csdn.net%2Faccount%2Flogin%3Foauth_provider%3DGitHubProvider" class="github"></a>
<a id="wechatAuthorizationUrl" href="javascript:void(0)" onClick="show();" class="wechat" target="_parent"></a>
<script src="/js/apps/weixinqr.js;jsessionid=63419DB743239B9DDDC0E079B7D98210.tomcat2"></script>
<div class="register-now"><span>还没有CSDN帐号？</span>
<span class="register tracking-ad" data-mod="popu_28">
<a href="/account/mobileregister?action=mobileRegisterView&service=http%3A%2F%2Fmy.csdn.net%2Fmy%2Fmycsdn">立即注册</a>
</span>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<div class="footer"></div>
<script data-main="/js/login-config.js;jsessionid=63419DB743239B9DDDC0E079B7D98210.tomcat2" src="/js/libs/require.js;jsessionid=63419DB743239B9DDDC0E079B7D98210.tomcat2"></script>
<script type="text/javascript">
document.write('<script type="text/javascript" src="//csdnimg.cn/pubfooter/js/publib_footer.js?' + Math.floor(new Date()/120000).toString(36) + '="></'+'script>');
</script>
</body>
</html>
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