E1101: false positive with urlparse.ParseResult geturl() after <instance>._replace(...)

[povesma]

New look of #597:
I got no-member warnings from code like this:

    parsed_url = parse.urlparse(url)
    sorted_query = parse.urlencode(sorted(parse.parse_qsl(parsed_url.query), key=lambda param: param[0]))
    new_parsed_url = parse.ParseResult._replace(parsed_url, query=sorted_query)
    new_url = new_parsed_url.geturl()

if I use an instance of ParseResult (new_parsed_url) instead of class static method, like:
new_parsed_url = parsed_url._replace(query=sorted_query)

the warning disappears.

$ pylint --version

pylint 2.7.4
astroid 2.5.3
Python 3.8.7 (default, Mar  9 2021, 10:52:42)
[Clang 12.0.0 (clang-1200.0.32.29)]

Steps to reproduce

pylint

Output is:

tests/api_test.py:28:14: E1101: Instance of 'ParseResult' has no 'geturl' member (no-member)

[yushao2]

from what i understand it seems like the issue lies with it being inferred as a namedtuple subclass due to _replace.

This is what I got from investigating the code that you've attached

>>> pprint(instance.as_string())
('\n'
 '\n'
 'class ParseResult(tuple):\n'
 '    __slots__ = ()\n'
 "    _fields = ['scheme', 'netloc', 'path', 'params', 'query', 'fragment']\n"
 '    \n'
 '    def _asdict(self):\n'
 '        return self.__dict__\n'
 '    \n'
 '    @classmethod\n'
 '    def _make(cls, iterable, new=tuple.__new__, len=len):\n'
 '        return new(cls, iterable)\n'
 '    \n'
 '    def _replace(self, scheme=None, netloc=None, path=None, params=None, '
 'query=None, fragment=None):\n'
 '        return self\n'
 '    \n'
 '    def __getnewargs__(self):\n'
 '        return tuple(self)\n'
 "    scheme = property(lambda self: self[0], doc='Alias for field number 0')\n"
 "    netloc = property(lambda self: self[1], doc='Alias for field number 1')\n"
 "    path = property(lambda self: self[2], doc='Alias for field number 2')\n"
 "    params = property(lambda self: self[3], doc='Alias for field number 3')\n"
 "    query = property(lambda self: self[4], doc='Alias for field number 4')\n"
 "    fragment = property(lambda self: self[5], doc='Alias for field number "
 "5')\n")

Since geturl is not an attribute of this inferred class, the warning is triggered.

I might be wrong here, still not too sure how to debug this except playing around with astroid

[yushao2]

I wrote a draft PR in an attempt to resolve this, please take a look and let me know if this is the correct approach 🙏