List of articles

• python package -requests
• • About requests package
  • Installation and use
  • • python requests request timeout
  • Sorting out common problems encountered in work
  • • visit https Website , Report errors certificate verify failed
    • Visit non http Port error ：raise ConnectionError(err, request=request)

python package -requests

Official website ：https://docs.python-requests.org/en/latest/user/install/

About requests package

Requests Yes, it is python Language based urllib Compiling , It's using Apache2 Licensed Open source protocol HTTP library ,Requests It will compare with urllib It is more convenient , Can save us a lot of work .

requests Packet sending http request , Get response data

Installation and use

python in requests Library usage details
Reference resources URL: https://zhuanlan.zhihu.com/p/137649301

command ：pip install requests
Import the project ：import requests

Use the official website directly Quick start

import requests
r = requests.get('https://api.github.com/events')
r = requests.post('https://httpbin.org/post', data={
'key': 'value'})
r = requests.put('https://httpbin.org/put', data={
'key': 'value'})
r = requests.delete('https://httpbin.org/delete')
r = requests.head('https://httpbin.org/get')
r = requests.options('https://httpbin.org/get')

python requests request timeout

Use timeout Parameter to set the number of seconds to wait for a connection , If the wait times out ,Requests It throws an exception

>>> requests.get('http://github.com', timeout=0.001)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
requests.exceptions.Timeout: HTTPConnectionPool(host='github.com', port=80): Request timed out. (timeout=0.001)
>>> requests.get('https://www.baidu.com',timeout=0.5)
<Response [200]>

Sorting out common problems encountered in work

visit https Website , Report errors certificate verify failed

The problem background ：
stay response =requests.get(url) Open one https The following error occurred during the connection ：

urllib.error.URLError: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:777)>

The solution is as follows , Add one verify=False：

response= requests.get(url=link, verify=False).json()

Visit non http Port error ：raise ConnectionError(err, request=request)

The problem background ：

When we visit non http When the port reports an error , Report errors raise ConnectionError(err, request=request)

Solution ：
Use exception capture processing

demo as follows ：