Method set_attr

crates/vm/src/builtins/type.rs:887–893

(&self, attr_name: &'static PyStrInterned, value: PyObjectRef)

    }

    pub fn set_attr(&self, attr_name: &'static PyStrInterned, value: PyObjectRef) {
        // Invalidate caches BEFORE modifying attributes so that borrowed
        // pointers in cache entries are nullified while the source objects
        // are still alive.
        self.modified();
        self.attributes.write().insert(attr_name, value);
    }

    /// Internal get_attr implementation for fast lookup on a class.
    /// Searches the full MRO (including self) with method cache acceleration.