python3.x里面urllib不流行了，开始用requests包。
1、安装requests包
1）pip安装
pip install requests
2）pycharm里面安装：
先打开设置，点加号，
image.png
然后搜索requests，点install
image.png
2、get请求
import requests
r = requests.get("http://xxxxx?name=aaa")
print(r.text)
3、post请求
import requests
postdata = { 'name':'aaa' }
r = requests.post("http://xxxxx?name=aaa",data=postdata)
print(r.text)
4、其他类型的请求
>>> 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")
5、json方式传参——不用再拼url了
#example1：
>>> payload = {'key1': 'value1', 'key2': 'value2'}
>>> r = requests.get("http://httpbin.org/get", params=payload)
#example2：
>>> 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
4、带session请求
s = requests.Session()
headers = { 'Host':'www.xxx.com'}
postdata = { 'name':'aaa' }
url = "http://xxxxx"
s.headers.update(headers)
r = s.post(url,data=postdata)
print(r.text)
比urllib和urllib2简单好多有木有。
更详细的资料参考，介绍的超好：
http://docs.python-requests.org/zh_CN/latest/user/quickstart.html
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