python 小爬虫的各种总结（二）

<form method="post" id="loginForm" class="login-form" action="http://www.renren.com/PLogin.do">
    <dl class="top clearfix">
        <dd>
            <input type="text" name="email" class="input-text" id="email" tabindex="1"
            value="" />
        </dd>
    </dl>
    <dl class="pwd clearfix">
        <dd>
            <input type="password" id="password" name="password" error="请输入密码" class="input-text"
            tabindex="2" autocomplete="off" />
            <label class="pwdtip" id="pwdTip" for="password">
                请输入密码
            </label>
            <a class="forgetPwd" id="forgetPwd" href="http://safe.renren.com/findPass.do"
            stats="home_findpassword">
                忘记密码？
            </a>
        </dd>
    </dl>
    <div class="caps-lock-tips" id="capsLockMessage" style="display:none">
    </div>
    <dl class="savepassword clearfix">
        <dt>
            <label title="为了确保您的信息安全，请不要在网吧或者公共机房勾选此项！" for="autoLogin" class="labelCheckbox">
                <input type="checkbox" name="autoLogin" id="autoLogin" value="true" tabindex="4"
                />
                下次自动登录
            </label>
        </dt>
        <dd>
            <span class="getpassword" id="getpassword">
                <a href="http://safe.renren.com/findPass.do" stats="home_findpassword">
                    忘记密码？
                </a>
            </span>
        </dd>
    </dl>
    <dl id="code" class="code clearfix">
        <dt>
            <label for="code">
                验证码:
            </label>
        </dt>
        <dd>
            <input id="icode" type="text" name="icode" class="input-text" tabindex="3"
            autocomplete="off" />
            <label class="codetip" id="codeTip" for="icode">
                请输入验证码
            </label>
        </dd>
    </dl>
    <dl id="codeimg" class="codeimg clearfix">
        <dt>
        </dt>
        <dd>
            <img id="verifyPic_login" src="http://icode.renren.com/getcode.do?t=web_login&rnd=Math.random()"
            />
        </dd>
        <a class="changeone" href="javascript:refreshCode_login();">
            换一个
        </a>
    </dl>
    <dl class="bottom">
        <input type="hidden" name="origURL" value="http://www.renren.com/home"
        />
        <input type="hidden" name="domain" value="renren.com" />
        <input type="hidden" name="key_id" value="1" />
        <input type="hidden" name="captcha_type" id="captcha_type" value="web_login"
        />
        <input type="submit" id="login" class="input-submit login-btn" stats="loginPage_login_button"
        value="登录" tabindex="5" />
    </dl>
</form>