1.生成一个管理cookie的对像，创建一个支持cookie的对象，对象属于HTTPCookieProccesor

cookie = CookieJar()

cookie_handler = HTTPCookieProccesor(cookie)

opener = build_opner.open(cookie_handler)

response = opner.open('http://www.neihanshequ.com/')

print(response)

#获取cookie

for cookie in cookie:

    print('key',cookie.name)

2.模拟登陆美食杰

cookie = LWPCookieJar(filename='meishi.txt')

cookie_handler = HTTPCookieProccesor(cookie)

opener = build_opener(cookie_handler)

headers =  {

       'User-Agent':'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.181 Safari/537.36'

}

start_url = 'https://i.meishi.cc/login.php?redirect=https%3A%2F%2Fi.meishi.cc%2Flogin.php%3Fac%3Dzhuce'

pass_data = urlencode({

      'username':'[email protected]',
    'password':'542999'

})

#请求url，并传参，并设置编码格式

request - Request(post_url, bytes(pass_data, encoding='utf-8'))

response  = opener.open(request)

print(response.read().decode())  （这个解析在cookie的用法中很重要）

cookie.save(ignore_discard=True, ignore_expires=True)