learn_requests

 # -*- coding: utf-8 -*-
 import requests

 URL_IP = 'http://localhost:8000/ip'
 URL_GET = 'http://localhost:8000/get'

 def use_simple_requests():
     response = requests.get(URL_IP)
     print '>>>>Response Headers:'
     print response.headers
     print '>>>>Response body:'
     print response.text

 def use_params_requests():
     params = {'param1': 'hello', 'param2': 'world'}
     response = requests.get(URL_GET, params=params)
     print '>>>>Response Headers:'
     print response.headers
     print '>>>>Status Code:'
     print response.status_code
     print '>>>>Reason:'
     print response.reason
     print '>>>>Request body:'
     print response.text

 if __name__ == '__main__':
     print '>>>Use simple requests:'
     use_simple_requests()
     print ''
     print '>>>Use params requests:'
     use_params_requests()

 # -*- coding: utf-8 -*-
 import urllib
 import urllib2

 URL_IP = 'http://localhost:8000/ip'
 URL_GET = 'http://localhost:8000/get'

 def use_simple_urllib2():
     response = urllib2.urlopen(URL_IP)
     print '>>>>Response Headers:'
     print response.info()
     print '>>>>Response body:'
     print ''.join([line for line in response.readlines()])

 def use_params_urllib2():
     params = urllib.urlencode({'param1': 'hello', 'param2': 'world'})
     response = urllib2.urlopen('?'.join([URL_GET, '%s']) % params)
     print '>>>>Response Headers:'
     print response.info()
     print '>>>>Status Code:'
     print response.getcode()
     print '>>>>Request body:'
     print ''.join([line for line in response.readlines()])

 if __name__ == '__main__':
     print '>>>Use simple urllib2:'
     use_simple_urllib2()
     print ''
     print '>>>Use params urllib2:'
     use_params_urllib2()

 # -*- coding: utf-8 -*-
 import json
 import requests
 from requests import exceptions

 URL = 'https://api.github.com'

 def build_uri(endpoint):
     return '/'.join([URL, endpoint])

 def better_print(json_str):
     return json.dumps(json.loads(json_str), indent=4)

 def request_method():
     response = requests.get(build_uri('user/emails'), auth=('imoocdemo', 'imoocdemo123'))
     print better_print(response.text)

 def params_request():
     response = requests.get(build_uri('users'), params={'since': 11})
     print better_print(response.text)
     print response.request.headers
     print response.url

 def json_request():
     # response = requests.patch(build_uri('user'), auth=('imoocdemo', 'imoocdemo123'), json={'name': 'babymooc2', 'email': 'hello-world@imooc.org'})
     response = requests.post(build_uri('user/emails'), auth=('imoocdemo', 'imoocdemo123'), json=['helloworld@github.com'])
     print better_print(response.text)
     print response.request.headers
     print response.request.body
     print response.status_code

 def timeout_request():
     try:
         response = requests.get(build_uri('user/emails'), timeout=10)
         response.raise_for_status()
     except exceptions.Timeout as e:
         print e.message
     except exceptions.HTTPError as e:
         print e.message
     else:
         print response.text
         print response.status_code

 def hard_requests():
     from requests import Request, Session
     s = Session()
     headers = {'User-Agent': 'fake1.3.4'}
     req = Request('GET', build_uri('user/emails'), auth=('imoocdemo', 'imoocdemo123'), headers=headers)
     prepped = req.prepare()
     print prepped.body
     print prepped.headers

     resp = s.send(prepped, timeout=5)
     print resp.status_code
     print resp.request.headers
     print resp.text

 if __name__ == '__main__':
     hard_requests()

 # -*- coding: utf-8 -*-
 import requests

 response = requests.get('https://api.github.com')
 print "状态码，具体解释"
 print response.status_code, response.reason
 print "头部信息"
 print response.headers
 print "URL 信息"
 print response.url
 print "redirect 信息"
 print response.history
 print "耗费时长"
 print response.elapsed
 print "request 信息"
 print response.request.method

 print '----------------------'

 print "编码信息"
 print response.encoding
 print "消息主体内容: byte"
 print response.content, type(response.content)
 print "消息主体内容: 解析"
 print response.text, type(response.text)
 print "消息主体内容"
 print response.json(), type(response.json())

 # -*- coding: utf-8 -*-
 import requests

 def get_key_info(response, *args, **kwargs):
     """回调函数
     """
     print response.headers['Content-Type']

 def main():
     """主程序
     """
     requests.get('https://api.github.com', hooks=dict(response=get_key_info))

 main()

 # -*- coding: utf -*-
 import requests

 def download_image():
     """demo: 下载图片, 文件
     """
     headers = {'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.93 Safari/537.36'}
     url = "http://img3.imgtn.bdimg.com/it/u=2228635891,3833788938&fm=21&gp=0.jpg"
     response = requests.get(url, headers=headers, stream=True)
     with open('demo.jpg', 'wb') as fd:
         for chunk in response.iter_content(128):
             fd.write(chunk)

 def download_image_improved():
     """demo: 下载图片
     """
     # 伪造headers信息
     headers = {'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.93 Safari/537.36'}
     # 限定url
     url = "http://img3.imgtn.bdimg.com/it/u=2228635891,3833788938&fm=21&gp=0.jpg"
     response = requests.get(url, headers=headers, stream=True)
     from contextlib import closing
     with closing(requests.get(url, headers=headers, stream=True)) as response:
         # 打开文件
         with open('demo1.jpg', 'wb') as fd:
             # 每128写入一次
             for chunk in response.iter_content(128):
                 fd.write(chunk)

 download_image_improved()

session和cookie

from:http://www.imooc.com/learn/736