code: def delete_fixup(self, node):
      # 4 cases
      while node is not self.root and node.color == 0:
          # node is not root and color is black
          if node is node.parent.left:
              # node is left node
              node_brother = node.parent.right
  
              # case 1: node's red, can not get black node
              # set brother is black and parent is red
              if node_brother.color == 1:
                  node_brother.color = 0
                  node.parent.color = 1
                  self.left_rotate(node.parent)
                  node_brother = node.parent.right
  
              # case 2: brother node is black, and its children node is both black
              if (
                  node_brother.left is None
                  or node_brother.left.color == 0
              ) and (
                  node_brother.right is None
                  or node_brother.right.color == 0
              ):
                  node_brother.color = 1
                  node = node.parent
              else:
                  # case 3: brother node is black , and its left child node is red and right is black
                  if (
                      node_brother.right is None
                      or node_brother.right.color == 0
                  ):
                      node_brother.color = 1
                      node_brother.left.color = 0
                      self.right_rotate(node_brother)
                      node_brother = node.parent.right
  
                  # case 4: brother node is black, and right is red, and left is any color
                  node_brother.color = node.parent.color
                  node.parent.color = 0
                  node_brother.right.color = 0
                  self.left_rotate(node.parent)
                  node = self.root
          else:
              node_brother = node.parent.left
              if node_brother.color == 1:
                  node_brother.color = 0
                  node.parent.color = 1
                  self.left_rotate(node.parent)
                  node_brother = node.parent.right
              if (
                  node_brother.left is None
                  or node_brother.left.color == 0
              ) and (
                  node_brother.right is None
                  or node_brother.right.color == 0
              ):
                  node_brother.color = 1
                  node = node.parent
              else:
                  if (
                      node_brother.left is None
                      or node_brother.left.color == 0
                  ):
                      node_brother.color = 1
                      node_brother.right.color = 0
                      self.left_rotate(node_brother)
                      node_brother = node.parent.left
                  node_brother.color = node.parent.color
                  node.parent.color = 0
                  node_brother.left.color = 0
                  self.right_rotate(node.parent)
                  node = self.root
      node.color = 0
  
file_path: keon-algos/algorithms/tree/red_black_tree/red_black_tree.py
label_desc: Use image node_id 10 for calling the RBTree obj's underlying member method code with example usage: obj.delete_fixup(node) without return types