前端js:

1，设置cookie：　　document.cookie = ‘name=zhangsan‘2，读取cookie：　　console.log(document.cookie)（直接读就行）3，删除cookie：　　为了删除指定名称的cookie，可以将其过期时间设定为一个过去的时

//设置cookie
function setCookie(cname, cvalue, exdays) {
    var d = new Date();
    d.setTime(d.getTime() + (exdays*24*60*60*1000));
    var expires = "expires="+d.toUTCString();
    document.cookie = cname + "=" + cvalue + "; " + expires;
}
//获取cookie
function getCookie(cname) {
    var name = cname + "=";
    var ca = document.cookie.split(‘;‘);
    for(var i=0; i<ca.length; i++) {
        var c = ca[i];
        while (c.charAt(0)==‘ ‘) c = c.substring(1);
        if (c.indexOf(name) != -1) return c.substring(name.length, c.length);
    }
    return "";
}
//清除cookie
function clearCookie(name) {
    setCookie(name, "", -1);
}
function checkCookie() {
    var user = getCookie("username");
    if (user != "") {
        alert("Welcome again " + user);
    } else {
        user = prompt("Please enter your name:", "");
        if (user != "" && user != null) {
            setCookie("username", user, 365);
        }
    }
}
checkCookie();   

后端Python（flask）：

1，设置cookie：　　from flask import make_response
　　@app.route(‘/‘)
　　def index():
    　　resp = make_response(render_template(...))
    　　resp.set_cookie(‘username‘, ‘the username‘)
    　　return resp2，读取cookie：　　request.cookies.get(‘username‘)3,删除cookie：　　resp.set_cookie(‘username‘, ‘‘, expires=0)

另：

python—cookielib模块对cookies的操作

http://www.cnblogs.com/isuifeng/p/5903116.html 这个没看，不是很了解