python爬虫经常会用到requests库，这个库相对与python自带的urlib库来说比较好用，几天主要是记录下requests库怎么使用cookies进行传输
requests库的简单用法
>>> import requests
>>> url = 'https://www.h3blog.com'
>>>
>>> ret = requests.get(url)
>>> print(ret)
<Response [200]>
>>>
requests在headers中使用cookie
代码如下：
>>> import requests
>>>
>>>
>>> url = 'https://www.h3blog.com'
>>>
>>> headers = {'Cookie':'h3blog'}
>>>
>>> ret = requests.get(url,headers = headers)
>>> print(ret)
<Response [200]>
>>>
requests使用cookies参数进行传值
在requests的get或post方法中有一个cookies参数，该参数类型为字典，只需要将要设置的参数包装成字典就可以传参了
>>> import requests
>>>
>>>
>>> url = 'https://www.h3blog.com'
>>>
>>> cookies = {'h3blog':'la la la la la la '}
>>> ret = requests.get(url,cookies = cookies)
>>> print(ret)
<Response [200]>
>>>
使用requests的session进行请求
>>> session = requests.session()
>>>
>>> url = 'https://www.h3blog.com/login'
>>> data = {'name':'zhangsan','password':'123456'}
>>> session.post(url,data)
<Response [200]>
>>>
>>> session.get(url)
<Response [200]>
>>>
