If http:@localhost url is entered as an argument value of the urlpasre() function, the parser cannot parse it properly. Since http:@localhost is a valid URL, the character after the @ character must be parsed as a hostname.

Python 3.9.10 (main, Jan 15 2022, 11:48:04)
[Clang 13.0.0 (clang-1300.0.29.3)] on darwin
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>>> from urllib.parse import urlparse
>>> print(urlparse('http:@localhost'))
ParseResult(scheme='http', netloc='', path='@localhost', params='', query='', fragment='')
>>>

>>> print(urlparse('https:\\google.com'))
ParseResult(scheme='https', netloc='', path='\\google.com', params='', query='', fragment='')
>>> print(urlparse('https://google.com@localhost'))
ParseResult(scheme='https', netloc='google.com@localhost', path='', params='', query='', fragment='')
>>>

Perhaps this parser is not able to parse the URL normally.

Here are the results from other languages. Go parses incorrectly at the same time rust does it correctly.

Go- https://go.dev/play/p/nNMhyznuGpn
&url.URL{Scheme:"http", Opaque:"@localhost", User:(*url.Userinfo)(nil), Host:"", Path:"", RawPath:"", ForceQuery:false, RawQuery:"", Fragment:"", RawFragment:""}


Rust- https://play.rust-lang.org/?version=stable&mode=debug&edition=2021&gist=92681b56f7cbd62b7735c962a2f5321e
Url { scheme: "http", cannot_be_a_base: false, username: "", password: None, host: Some(Domain("localhost")), port: None, path: "/", query: None, fragment: None }

Nice Check. So what do you think about this issue? I want to hear your opinions.