selenium+python 单选框校验

<html>  
    <head>  
    <meta http-equiv="content-type" content="text/html;charset=utf-8" />  
    <title>单选和复选</title>  
    </head>  
    <body>  
    
    </form>  
    <h4>单选：性别</h4>   
    <form>  
    <label value="radio">男</label>   
    <input name="sex" value="male" id="boy" type="radio"><br>  
    <label value="radio1">女</label>  
    <input name="sex" value="female" id="girl" type="radio">  
    </form>