python模拟post请求时，对于没有name属性的文本框应该怎么传递数据呢

  <form method="post" onsubmit="return false;">

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                            <input type="text" id="input1" value="" class="input-text" onkeydown="check_enter(event)" /> <span id="tip_input1" class="tip"></span>

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                            <label class="label-line">密码(<a href="/GetMyPassword.aspx" tabindex="-1" class="tb_right">重置</a>)</label>

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                        </div>

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                            <input type="submit" id="signin" class="button" value="加载中..." /> <span id="tip_btn" class="tip"></span>

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