requests 模块实现小爬虫

requests
安装
pip3 install requests
官方中文文档：http://cn.python-requests.org/zh_CN/latest/user/quickstart.html#id4
get

# 1、无参数实例
  
import requests
  
ret = requests.get('https://github.com/timeline.json')
  
print(ret.url)
print(ret.text)
  
  
# 2、有参数实例
  
import requests
  
payload = {'key1': 'value1', 'key2': 'value2'}
ret = requests.get("http://httpbin.org/get", params=payload)
  
print(ret.url)
print(ret.text)

POST

# 1、基本POST实例
  
import requests
  
payload = {'key1': 'value1', 'key2': 'value2'}
ret = requests.post("http://httpbin.org/post", data=payload)
  
print(ret.text)
  
  
# 2、发送请求头和数据实例
  
import requests
import json
  
url = 'https://api.github.com/some/endpoint'
payload = {'some': 'data'}
headers = {'content-type': 'application/json'}
  
ret = requests.post(url, 
                    data=json.dumps(payload), 
                    headers=headers)

print(ret.text)
print(ret.cookies)

# 上面的等同于
ret = requests.post(url, json=payload)