import requestsimport http.cookiejar as cookielibimport reimport timeimport os.pathfrom PIL import Image# 构造 Request headersheaders = {    "Host": "www.dotcpp.com",    "Referer": "http://www.dotcpp.com/oj/loginpage.php",    ‘User-Agent‘: ‘Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:53.0) Gecko/20100101 Firefox/53.0‘,}# 构造 cookie 信息session = requests.session()session.cookies = cookielib.LWPCookieJar(filename=‘cookies‘)try:    session.cookies.load(ignore_discard=True) # 如果已经有 cookie信息的话 直接用于登录except:    print("Cookie 未能加载")    def get_capther():    captcha_url = ‘http://www.dotcpp.com/oj/vcode.php‘    r = session.get(captcha_url, headers=headers)    with open(‘captcha.jpg‘, ‘wb‘) as f:        f.write(r.content)        f.close()    try:        im = Image.open(‘captcha.jpg‘)        im.show()        im.close()    except:        print(u‘请到 %s 目录找到captcha.jpg 手动输入‘ % os.path.abspath(‘captcha.jpg‘))    captcha = input("please input the captcha\n>")    return captchadef login():    post_url = ‘http://www.dotcpp.com/oj/login.php‘    postdata = {        ‘user_id‘: ‘xpower‘,        ‘password‘: ‘q.123456‘,        ‘vcode‘: get_capther()    }        login_page = session.post(post_url, data=http://www.mamicode.com/postdata, headers=headers)    text = str(login_page.content,‘utf-8‘)    print(text)