urllib.parse.urlparse change of behavior using url with port in python3.9

[vincentBaer]

Test without venv in centos7 and in docker python3.9.3 also.
Version: v1.7.1
Python3: 3.9.3
Config:

{"default":
    {"access_key": "ak",
      "secret_key": "sk",
      "host": "outscale.com:443",
      "https": true,
      "method": "POST",
      "region_name": "eu-west-2"
    }
}  

Command launch:

osc-cli api ReadLoadBalancers

You have now :

requests.exceptions.InvalidSchema: No connection adapters were found for 'api.eu-west-2.outscale.com:443//api/latest/ReadLoadBalancers' 

Instead of with version python3.7 or python3.6:

osc_sdk.sdk.OscApiException: Error --> status = 401, code = 1, Reason = AccessDenied, request_id = 93acf326-9269-4abb-98b0-c5257c417270 

With more investigation the issue is linked with the behavior of urllib.parse.urlparse (the same version in python3.7 and python 3.9 (urllib3==1.24.3)) https://github.com/outscale/osc-cli/blob/master/osc_sdk/sdk.py#L194

In python3.7:

ParseResult(scheme='', netloc='', path='api.eu-west-2.outscale.com:443', params='', query='', fragment='')

In python3.9:

ParseResult(scheme='api.eu-west-2.outscale.com', netloc='', path='443', params='', query='', fragment='')

https://docs.python.org/3/library/urllib.parse.html (Following the syntax specifications in RFC 1808, urlparse recognizes a netloc only if it is properly introduced by ‘//’)

If you have add '//' in endpoint to respect RFC 1808, urllib.parse.urlparse parse correctly:

ParseResult(scheme='', netloc='', path='api.eu-west-2.outscale.com:443', params='', query='', fragment='')