根是黑的吗

同一棵树。运行下面这段程序：

class RNode:
    def __init__(self, val, color):
        self.val = val
        self.color = color
        self.left = None
        self.right = None

def rb_tree():
    root = RNode(17, "黑")
    root.left = RNode(15, "红")
    root.right = RNode(24, "黑")
    root.left.left = RNode(13, "红")
    return root

print(rb_tree().color == "黑")