Python requests模块学习

import requests

下面就可以使用神奇的requests模块了！

1.向网页发送数据

>>> payload = {‘key1‘: ‘value1‘, ‘key2‘: [‘value2‘, ‘value3‘]}

>>> r = requests.get(‘http://httpbin.org/get‘, params=payload)
>>> print(r.url)
http://httpbin.org/get?key1=value1&key2=value2&key2=value3

　　post与get方法都类似，只不过不是params=...而是data=...

>>> r = requests.put("http://httpbin.org/put")
>>> r = requests.delete("http://httpbin.org/delete")
>>> r = requests.head("http://httpbin.org/get")
>>> r = requests.options("http://httpbin.org/get")

2.把Response保存到文件里（官方文档推荐的方法）

with open(filename, ‘wb‘) as fd:
    for chunk in r.iter_content(chunk_size):
        fd.write(chunk)

3. r的一些属性

　　r.encoding  #编码

　　r.status_code  #状态码（404,200等）

　　r.raise_for_status()  #如果状态码不是200会发起报错

4.高级用法（会话对象——仿真网页操作）：http://cn.python-requests.org/zh_CN/latest/user/advanced.html#advanced