From ed9273c40cd0fdf853db6ac1fdfa65a662796512 Mon Sep 17 00:00:00 2001
From: AN Long <aisk1988@gmail.com>
Date: Mon, 2 Mar 2026 22:36:12 +0900
Subject: [PATCH] py: fix bound __index__

---
 py/method.go    | 5 +++++
 py/tests/int.py | 4 ++++
 2 files changed, 9 insertions(+)

diff --git a/py/method.go b/py/method.go
index 438ad5f4..04a36351 100644
--- a/py/method.go
+++ b/py/method.go
@@ -192,6 +192,11 @@ func newBoundMethod(name string, fn interface{}) (Object, error) {
 		m.method = func(_ Object) (Object, error) {
 			return f()
 		}
+	// M__index__() (Int, error)
+	case func() (Int, error):
+		m.method = func(_ Object) (Object, error) {
+			return f()
+		}
 	// M__add__(other Object) (Object, error)
 	case func(Object) (Object, error):
 		m.method = func(_ Object, other Object) (Object, error) {
diff --git a/py/tests/int.py b/py/tests/int.py
index 79356b3c..f7a98706 100644
--- a/py/tests/int.py
+++ b/py/tests/int.py
@@ -24,6 +24,10 @@
 assert repr(1000000000000000000000000000000) == "1000000000000000000000000000000"
 assert repr(-1000000000000000000000000000000) == "-1000000000000000000000000000000"
 
+doc="index"
+assert True.__index__() == 1
+assert False.__index__() == 0
+
 doc="test overflow"
 assert int("1000000000000000000") == 10**18
 assert int("-1000000000000000000") == -(10**18)