Antti Haapala added the comment:
The problem is in `urlunparse`. If you check the RFC 2396, it has the following
regular expression:
^(([^:/?#]+):)?(//([^/?#]*))?([^?#]*)(\?([^#]*))?(#(.*))?
where group 3 is the //netloc, and 4 is netloc substring, of an url
http://netloc/foobar - and this is what Python should use to parse an URI using
RFC 2396... but:
>>> pat.fullmatch('////netloc').group(4)
''
>>> pat.fullmatch('/relative').group(4)
>>>
Someone took the shortcut. no netloc is different from netloc being the empty
string '', but
>>> urlparse('////netloc')
ParseResult(scheme='', netloc='', path='//netloc', params='', query='',
fragment='')
>>> urlparse('/netloc')
ParseResult(scheme='', netloc='', path='/netloc', params='', query='',
fragment='')
In the latter parsing result netloc should be *None*. Unfortunately I believe
it is too late to change this either way.
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nosy: +ztane
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<http://bugs.python.org/issue23505>
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