Fixed false positive of no-member for methods of namedtuples instances

ChangeLog

@@ -60,6 +60,11 @@ modules are added.
 
   Closes #3619
 
+* Fix raising false-positive ``no-member`` on instances' methods where class can be inferred
+  to be derived from Named Tuples
+
+  Closes #4377
+
 * Fix documentation errors in "Block disables" paragraph of User Guide.
 
 * New checker ``unnecessary-dict-index-lookup``. Emitted when iterating over dictionary items

doc/whatsnew/2.9.rst

@@ -44,6 +44,9 @@ Other Changes
 
 * Fix incompatibility with Python 3.6.0 caused by ``typing.Counter`` and ``typing.NoReturn`` usage
 
+* Fix raising false-positive ``no-member`` on instances' methods where class can be inferred
+  to be derived from Named Tuples
+
 * Allow comma-separated list in ``output-format`` and separate output files for
   each specified format.  Each output file can be defined after a semicolon for example : ``--output-format=json:myfile.json,colorized``
 

pylint/checkers/typecheck.py

@@ -517,6 +517,24 @@ def _emit_no_member(node, owner, owner_name, ignored_mixins=True, ignored_none=T
         # See https://github.com/PyCQA/pylint/issues/4123
         return False
 
+    if (
+        isinstance(node.parent, astroid.Call)
+        and isinstance(owner, astroid.Instance)
+        and isinstance(owner.parent, astroid.Module)
+        and isinstance(getattr(owner, "_proxied", None), astroid.ClassDef)
+        and any(
+            (
+                isinstance(b, astroid.Name)
+                and b.name == "tuple"
+                and utils.is_builtin_object(utils.safe_infer(b))
+            )
+            for b in owner._proxied.bases
+        )
+    ):
+        # Avoid false positive on function calls on instances of named tuples
+        # See https://github.com/PyCQA/pylint/issues/4377
+        return False
+
     return True
 
 

tests/functional/m/member/member_checks.py

@@ -231,3 +231,17 @@ class Animal(Enum):
     print(keyy)
 for vall in Animal.__members__.values():
     print(vall)
+
+# To test false positive no-member after _replace() described in issue #4377
+# pylint: disable=invalid-name
+from urllib import parse
+parsed_url = parse.urlparse("http://www.this-is-weird.com")
+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()  # This should not trigger a warning
+
+new_parsed_url = parsed_url._replace(query=sorted_query)
+new_url = new_parsed_url.geturl()