requests库的使用方法

1. 发送GET请求

import requests

response = requests.get('https://www.baidu.com/')
print(response.text)

2. 发送POST请求

import requests

data = {'username': 'admin', 'password': '123456'}
response = requests.post('https://www.example.com/login', data=data)
print(response.text)

3. 添加请求头

import requests

headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.3'}
response = requests.get('https://www.example.com/', headers=headers)
print(response.text)

4. 设置超时时间

import requests

response = requests.get('https://www.example.com/', timeout=3)
print(response.text)

5. 处理响应内容

import requests

response = requests.get('https://www.example.com/')
print(response.status_code)
print(response.headers)
print(response.cookies)
print(response.text)

6. 处理异常

import requests

try:
    response = requests.get('https://www.example.com/')
    response.raise_for_status()
except requests.exceptions.HTTPError as e:
    print(e)
except requests.exceptions.Timeout as e:
    print(e)
except requests.exceptions.RequestException as e:
    print(e)
else:
    print(response.text)