From 2833cd8896063f7d7cf2372557fd30772bc12332 Mon Sep 17 00:00:00 2001
From: Jiseok CHOI <jiseok.dev@gmail.com>
Date: Sun, 1 Mar 2026 00:55:12 +0900
Subject: [PATCH] add isatty() method in BytesIO (#7243)

---
 crates/vm/src/stdlib/io.rs | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/crates/vm/src/stdlib/io.rs b/crates/vm/src/stdlib/io.rs
index fb3d8cadf..26d4a67c8 100644
--- a/crates/vm/src/stdlib/io.rs
+++ b/crates/vm/src/stdlib/io.rs
@@ -4768,6 +4768,15 @@ mod _io {
 
             Ok(())
         }
+
+        #[pymethod]
+        fn isatty(&self, vm: &VirtualMachine) -> PyResult<bool> {
+            if self.closed() {
+                return Err(io_closed_error(vm));
+            }
+
+            Ok(false)
+        }
     }
 
     #[pyclass]