Christian Heimes added the comment:
Requests is a 3rd party package and not part of the standard library.
There is a problem with the HTTP server at http://183.246.199.100:8321. It is
sending a HTTP redirect with the port number duplicated: ":8321:8321". Please
report the issue to the server
New submission from yonghao hu :
Run the following code or report an error, and the URL is a normal URL：
'''
python3 -c "import requests;requests.get('http://183.246.199.100:8321')"
'''
Error code：
'''
requests.exceptions.InvalidURL: Failed to parse:
http://183.246.199.100:8321:8321/SSO/EnrollLi
