Fix a false positive for bad-dunder-name when there is a user-def…

…ined ``__index__`` method. Closes pylint-dev#8613
mbyrnepr2 · Apr 24, 2023 · 94cd2e3 · 94cd2e3
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diff --git a/doc/whatsnew/fragments/8613.false_positive b/doc/whatsnew/fragments/8613.false_positive
@@ -0,0 +1,3 @@
+Fix a false positive for ``bad-dunder-name`` when there is a user-defined ``__index__`` method.
+
+Closes #8613
diff --git a/pylint/constants.py b/pylint/constants.py
@@ -231,6 +231,7 @@ def _get_pylint_home() -> str:
     "__getnewargs_ex__",
     "__getnewargs__",
     "__getstate__",
+    "__index__",
     "__setstate__",
     "__reduce__",
     "__reduce_ex__",

diff --git a/tests/functional/ext/bad_dunder/bad_dunder_name.py b/tests/functional/ext/bad_dunder/bad_dunder_name.py
@@ -49,6 +49,9 @@ def __private_method(self):
     def __doc__(self):
         return "Docstring"
 
+    def __index__(self):
+        return 1
+
 
 def __increase_me__(val):
     return val + 1